u32 ptr;
} __packed;
-static void reload_gdt(void)
+static void load_ds(u32 segment)
{
- /*
- * There are machines which are known to not boot with the GDT
- * being 8-byte unaligned. Intel recommends 16 byte alignment
- */
- static const u64 boot_gdt[] __attribute__((aligned(16))) = {
- /* CS: code, read/execute, 4 GB, base 0 */
- [GDT_ENTRY_32BIT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff),
- /* DS: data, read/write, 4 GB, base 0 */
- [GDT_ENTRY_32BIT_DS] = GDT_ENTRY(0xc093, 0, 0xfffff),
- /* 16-bit CS: code, read/execute, 64 kB, base 0 */
- [GDT_ENTRY_16BIT_CS] = GDT_ENTRY(0x109b, 0, 0x0ffff),
- /* 16-bit DS: data, read/write, 64 kB, base 0 */
- [GDT_ENTRY_16BIT_DS] = GDT_ENTRY(0x1093, 0, 0x0ffff),
- };
- static struct gdt_ptr gdt;
-
- gdt.len = sizeof(boot_gdt)-1;
- gdt.ptr = (u32)&boot_gdt;
-
- asm volatile("lgdtl %0\n" \
- "movl $((2+1)*8), %%ecx\n" \
- "movl %%ecx, %%ds\n" \
- "movl %%ecx, %%es\n" \
- "movl %%ecx, %%fs\n" \
- "movl %%ecx, %%gs\n" \
- "movl %%ecx, %%ss" \
- : : "m" (gdt) : "ecx");
+ asm volatile("movl %0, %%ds" : : "r" (segment * X86_GDT_ENTRY_SIZE));
+}
+
+static void load_es(u32 segment)
+{
+ asm volatile("movl %0, %%es" : : "r" (segment * X86_GDT_ENTRY_SIZE));
+}
+
+static void load_fs(u32 segment)
+{
+ asm volatile("movl %0, %%fs" : : "r" (segment * X86_GDT_ENTRY_SIZE));
+}
+
+static void load_gs(u32 segment)
+{
+ asm volatile("movl %0, %%gs" : : "r" (segment * X86_GDT_ENTRY_SIZE));
+}
+
+static void load_ss(u32 segment)
+{
+ asm volatile("movl %0, %%ss" : : "r" (segment * X86_GDT_ENTRY_SIZE));
+}
+
+static void load_gdt(const u64 *boot_gdt, u16 num_entries)
+{
+ struct gdt_ptr gdt;
+
+ gdt.len = (num_entries * 8) - 1;
+ gdt.ptr = (u32)boot_gdt;
+
+ asm volatile("lgdtl %0\n" : : "m" (gdt));
+}
+
+void init_gd(gd_t *id, u64 *gdt_addr)
+{
+ id->gd_addr = (ulong)id;
+ setup_gdt(id, gdt_addr);
+}
+
+void setup_gdt(gd_t *id, u64 *gdt_addr)
+{
+ /* CS: code, read/execute, 4 GB, base 0 */
+ gdt_addr[X86_GDT_ENTRY_32BIT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff);
+
+ /* DS: data, read/write, 4 GB, base 0 */
+ gdt_addr[X86_GDT_ENTRY_32BIT_DS] = GDT_ENTRY(0xc093, 0, 0xfffff);
+
+ /* FS: data, read/write, 4 GB, base (Global Data Pointer) */
+ gdt_addr[X86_GDT_ENTRY_32BIT_FS] = GDT_ENTRY(0xc093, (ulong)id, 0xfffff);
+
+ /* 16-bit CS: code, read/execute, 64 kB, base 0 */
+ gdt_addr[X86_GDT_ENTRY_16BIT_CS] = GDT_ENTRY(0x109b, 0, 0x0ffff);
+
+ /* 16-bit DS: data, read/write, 64 kB, base 0 */
+ gdt_addr[X86_GDT_ENTRY_16BIT_DS] = GDT_ENTRY(0x1093, 0, 0x0ffff);
+
+ load_gdt(gdt_addr, X86_GDT_NUM_ENTRIES);
+ load_ds(X86_GDT_ENTRY_32BIT_DS);
+ load_es(X86_GDT_ENTRY_32BIT_DS);
+ load_gs(X86_GDT_ENTRY_32BIT_DS);
+ load_ss(X86_GDT_ENTRY_32BIT_DS);
+ load_fs(X86_GDT_ENTRY_32BIT_FS);
}
int x86_cpu_init_f(void)
int cpu_init_f(void) __attribute__((weak, alias("x86_cpu_init_f")));
int x86_cpu_init_r(void)
+{
+ /* Initialize core interrupt and exception functionality of CPU */
+ cpu_init_interrupts();
+ return 0;
+}
+int cpu_init_r(void) __attribute__((weak, alias("x86_cpu_init_r")));
+
+void x86_enable_caches(void)
{
const u32 nw_cd_rst = ~(X86_CR0_NW | X86_CR0_CD);
"andl %0, %%eax\n"
"movl %%eax, %%cr0\n"
"wbinvd\n" : : "i" (nw_cd_rst) : "eax");
+}
+void enable_caches(void) __attribute__((weak, alias("x86_enable_caches")));
- reload_gdt();
+int x86_init_cache(void)
+{
+ enable_caches();
- /* Initialize core interrupt and exception functionality of CPU */
- cpu_init_interrupts();
return 0;
}
-int cpu_init_r(void) __attribute__((weak, alias("x86_cpu_init_r")));
+int init_cache(void) __attribute__((weak, alias("x86_init_cache")));
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned short segment;
} __packed;
-struct idt_entry idt[256] __attribute__((aligned(16)));
+struct idt_entry idt[256] __aligned(16);
struct desc_ptr idt_ptr;
#include <config.h>
#include <version.h>
#include <asm/global_data.h>
+#include <asm/processor.h>
#include <asm/processor-flags.h>
-#include <generated/asm-offsets.h>
+#include <generated/generic-asm-offsets.h>
.section .text
.code32
/* This is the 32-bit cold-reset entry point */
/* Load the segement registes to match the gdt loaded in start16.S */
- movl $0x18, %eax
+ movl $(X86_GDT_ENTRY_32BIT_DS * X86_GDT_ENTRY_SIZE), %eax
movw %ax, %fs
movw %ax, %ds
movw %ax, %gs
*/
movl $CONFIG_SYS_INIT_SP_ADDR, %esp
+ /* Initialise the Global Data Pointer */
+ movl $CONFIG_SYS_INIT_GD_ADDR, %eax
+ movl %eax, %edx
+ addl $GENERATED_GBL_DATA_SIZE, %edx
+ call init_gd;
+
/* Set parameter to board_init_f() to boot flags */
xorl %eax, %eax
movw %bx, %ax
movw $0x85, %ax
jmp die
-.globl relocate_code
-.type relocate_code, @function
-relocate_code:
+.globl board_init_f_r_trampoline
+.type board_init_f_r_trampoline, @function
+board_init_f_r_trampoline:
/*
* SDRAM has been initialised, U-Boot code has been copied into
* RAM, BSS has been cleared and relocation adjustments have been
* made. It is now time to jump into the in-RAM copy of U-Boot
*
- * %eax = Address of top of stack
- * %edx = Address of Global Data
- * %ecx = Base address of in-RAM copy of U-Boot
+ * %eax = Address of top of new stack
*/
/* Setup stack in RAM */
movl %eax, %esp
- /* Setup call address of in-RAM copy of board_init_r() */
- movl $board_init_r, %ebp
- addl (GENERATED_GD_RELOC_OFF)(%edx), %ebp
-
- /* Setup parameters to board_init_r() */
- movl %edx, %eax
- movl %ecx, %edx
-
- /* Jump to in-RAM copy of board_init_r() */
- call *%ebp
+ /* Re-enter U-Boot by calling board_init_f_r */
+ call board_init_f_r
die:
hlt
.word 0x20 /* limit (32 bytes = 4 GDT entries) */
.long BOOT_SEG + gdt /* base */
- /* The GDT table ...
+/* Some CPUs are picky about GDT alignment... */
+.align 16
+gdt:
+ /*
+ * The GDT table ...
*
* Selector Type
* 0x00 NULL
* 0x10 32bit code
* 0x18 32bit data/stack
*/
+ /* The NULL Desciptor - Mandatory */
+ .word 0x0000 /* limit_low */
+ .word 0x0000 /* base_low */
+ .byte 0x00 /* base_middle */
+ .byte 0x00 /* access */
+ .byte 0x00 /* flags + limit_high */
+ .byte 0x00 /* base_high */
-gdt:
- .word 0, 0, 0, 0 /* NULL */
- .word 0, 0, 0, 0 /* unused */
+ /* Unused Desciptor - (matches Linux) */
+ .word 0x0000 /* limit_low */
+ .word 0x0000 /* base_low */
+ .byte 0x00 /* base_middle */
+ .byte 0x00 /* access */
+ .byte 0x00 /* flags + limit_high */
+ .byte 0x00 /* base_high */
- .word 0xFFFF /* 4Gb - (0x100000*0x1000 = 4Gb) */
- .word 0 /* base address = 0 */
- .word 0x9B00 /* code read/exec */
- .word 0x00CF /* granularity = 4096, 386 (+5th nibble of limit) */
+ /*
+ * The Code Segment Descriptor:
+ * - Base = 0x00000000
+ * - Size = 4GB
+ * - Access = Present, Ring 0, Exec (Code), Readable
+ * - Flags = 4kB Granularity, 32-bit
+ */
+ .word 0xffff /* limit_low */
+ .word 0x0000 /* base_low */
+ .byte 0x00 /* base_middle */
+ .byte 0x9b /* access */
+ .byte 0xcf /* flags + limit_high */
+ .byte 0x00 /* base_high */
- .word 0xFFFF /* 4Gb - (0x100000*0x1000 = 4Gb) */
- .word 0x0 /* base address = 0 */
- .word 0x9300 /* data read/write */
- .word 0x00CF /* granularity = 4096, 386 (+5th nibble of limit) */
+ /*
+ * The Data Segment Descriptor:
+ * - Base = 0x00000000
+ * - Size = 4GB
+ * - Access = Present, Ring 0, Non-Exec (Data), Writable
+ * - Flags = 4kB Granularity, 32-bit
+ */
+ .word 0xffff /* limit_low */
+ .word 0x0000 /* base_low */
+ .byte 0x00 /* base_middle */
+ .byte 0x93 /* access */
+ .byte 0xcf /* flags + limit_high */
+ .byte 0x00 /* base_high */
#ifndef __ASSEMBLY__
typedef struct global_data {
+ /* NOTE: gd_addr MUST be first member of struct global_data! */
+ unsigned long gd_addr; /* Location of Global Data */
bd_t *bd;
unsigned long flags;
unsigned long baudrate;
unsigned long bus_clk;
unsigned long relocaddr; /* Start address of U-Boot in RAM */
unsigned long start_addr_sp; /* start_addr_stackpointer */
+ unsigned long gdt_addr; /* Location of GDT */
+ unsigned long new_gd_addr; /* New location of Global Data */
phys_size_t ram_size; /* RAM size */
unsigned long reset_status; /* reset status register at boot */
void **jt; /* jump table */
char env_buf[32]; /* buffer for getenv() before reloc. */
} gd_t;
-extern gd_t *gd;
+static inline gd_t *get_fs_gd_ptr(void)
+{
+ gd_t *gd_ptr;
+
+ asm volatile("fs movl 0, %0\n" : "=r" (gd_ptr));
+
+ return gd_ptr;
+}
+
+#define gd get_fs_gd_ptr()
#endif
#define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */
#define GD_FLG_ENV_READY 0x00080 /* Environment imported into hash table */
-#if 0
#define DECLARE_GLOBAL_DATA_PTR
-#else
-#define XTRN_DECLARE_GLOBAL_DATA_PTR extern
-#define DECLARE_GLOBAL_DATA_PTR XTRN_DECLARE_GLOBAL_DATA_PTR \
-gd_t *gd
-#endif
#endif /* __ASM_GBL_DATA_H */
--- /dev/null
+/*
+ * (C) Copyright 2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _INIT_HELPERS_H_
+#define _INIT_HELPERS_H_
+
+int display_banner(void);
+int display_dram_config(void);
+int init_baudrate_f(void);
+int calculate_relocation_address(void);
+
+int copy_gd_to_ram_f_r(void);
+int init_cache_f_r(void);
+
+int set_reloc_flag_r(void);
+int mem_malloc_init_r(void);
+int init_bd_struct_r(void);
+int flash_init_r(void);
+int init_ip_address_r(void);
+int status_led_set_r(void);
+int set_bootfile_r(void);
+int set_load_addr_r(void);
+
+#endif /* !_INIT_HELPERS_H_ */
--- /dev/null
+/*
+ * (C) Copyright 2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _INIT_WRAPPERS_H_
+#define _INIT_WRAPPERS_H_
+
+int serial_initialize_r(void);
+int env_relocate_r(void);
+int pci_init_r(void);
+int jumptable_init_r(void);
+int pcmcia_init_r(void);
+int kgdb_init_r(void);
+int enable_interrupts_r(void);
+int eth_initialize_r(void);
+int reset_phy_r(void);
+int ide_init_r(void);
+int scsi_init_r(void);
+int doc_init_r(void);
+int bb_miiphy_init_r(void);
+int post_run_r(void);
+
+#endif /* !_INIT_WRAPPERS_H_ */
#ifndef __ASM_PROCESSOR_H_
#define __ASM_PROCESSOR_H_ 1
-#define GDT_ENTRY_32BIT_CS 2
-#define GDT_ENTRY_32BIT_DS (GDT_ENTRY_32BIT_CS + 1)
-#define GDT_ENTRY_16BIT_CS (GDT_ENTRY_32BIT_DS + 1)
-#define GDT_ENTRY_16BIT_DS (GDT_ENTRY_16BIT_CS + 1)
+#define X86_GDT_ENTRY_SIZE 8
+
+#ifndef __ASSEMBLY__
+
+enum {
+ X86_GDT_ENTRY_NULL = 0,
+ X86_GDT_ENTRY_UNUSED,
+ X86_GDT_ENTRY_32BIT_CS,
+ X86_GDT_ENTRY_32BIT_DS,
+ X86_GDT_ENTRY_32BIT_FS,
+ X86_GDT_ENTRY_16BIT_CS,
+ X86_GDT_ENTRY_16BIT_DS,
+ X86_GDT_NUM_ENTRIES
+};
+#else
+/* NOTE: If the above enum is modified, this define must be checked */
+#define X86_GDT_ENTRY_32BIT_DS 3
+#endif
+
+#define X86_GDT_SIZE (X86_GDT_NUM_ENTRIES * X86_GDT_ENTRY_SIZE)
#endif
--- /dev/null
+/*
+ * (C) Copyright 2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _RELOCATE_H_
+#define _RELOCATE_H_
+
+#include <common.h>
+
+int copy_uboot_to_ram(void);
+int clear_bss(void);
+int do_elf_reloc_fixups(void);
+
+#endif /* !_RELOCATE_H_ */
#undef __HAVE_ARCH_STRCHR
extern char * strchr(const char * s, int c);
-#undef __HAVE_ARCH_MEMCPY
+#define __HAVE_ARCH_MEMCPY
extern void * memcpy(void *, const void *, __kernel_size_t);
#undef __HAVE_ARCH_MEMMOVE
int cpu_init_r(void);
int x86_cpu_init_f(void);
int cpu_init_f(void);
+void init_gd(gd_t *id, u64 *gdt_addr);
+void setup_gdt(gd_t *id, u64 *gdt_addr);
+int init_cache(void);
/* cpu/.../timer.c */
void timer_isr(void *);
int video_bios_init(void);
int video_init(void);
+void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn));
+void board_init_f_r(void) __attribute__ ((noreturn));
#endif /* _U_BOOT_I386_H_ */
COBJS-$(CONFIG_SYS_PC_BIOS) += bios_setup.o
COBJS-y += board.o
COBJS-y += bootm.o
+COBJS-y += cmd_boot.o
COBJS-y += gcc.o
+COBJS-y += init_helpers.o
+COBJS-y += init_wrappers.o
COBJS-y += interrupts.o
COBJS-$(CONFIG_SYS_PCAT_INTERRUPTS) += pcat_interrupts.o
COBJS-$(CONFIG_SYS_GENERIC_TIMER) += pcat_timer.o
COBJS-$(CONFIG_PCI) += pci.o
COBJS-$(CONFIG_PCI) += pci_type1.o
COBJS-$(CONFIG_SYS_X86_REALMODE) += realmode.o
+COBJS-y += relocate.o
COBJS-y += string.o
COBJS-$(CONFIG_SYS_X86_ISR_TIMER) += timer.o
COBJS-$(CONFIG_VIDEO) += video_bios.o
rm_def_int:
iret
-
/*
- * All interrupt jumptable entries jump to here
- * after pushing the interrupt vector number onto the
- * stack.
+ * All interrupt jumptable entries jump to here after pushing the
+ * interrupt vector number onto the stack.
*/
any_interrupt16:
MAKE_BIOS_STACK
je Lint_1ah
movw $0xffff, %ax
jmp Lout
-Lint_10h: /* VGA BIOS services */
+Lint_10h:
+ /* VGA BIOS services */
call bios_10h
jmp Lout
Lint_11h:
Lint_12h:
call bios_12h
jmp Lout
-Lint_13h: /* BIOS disk services */
+Lint_13h:
+ /* BIOS disk services */
call bios_13h
jmp Lout
-Lint_15h: /* Misc. BIOS services */
+Lint_15h:
+ /* Misc. BIOS services */
call bios_15h
jmp Lout
-Lint_16h: /* keyboard services */
+Lint_16h:
+ /* keyboard services */
call bios_16h
jmp Lout
-Lint_1ah: /* PCI bios */
+Lint_1ah:
+ /* PCI bios */
call bios_1ah
jmp Lout
Lout:
cmpw $0, %ax
je Lhandeled
- /* Insert code for unhandeled INTs here.
+ /*
+ * Insert code for unhandeled INTs here.
*
- * ROLO prints a message to the console
- * (we could do that but then we're in 16bit mode
- * so we'll have to get back into 32bit mode
- * to use the console I/O routines (if we do this
- * we shuls make int 0x10 and int 0x16 work as well))
+ * ROLO prints a message to the console we could do that but then
+ * we're in 16bit mode so we'll have to get back into 32bit mode
+ * to use the console I/O routines (if we do this we should make
+ * int 0x10 and int 0x16 work as well)
*/
Lhandeled:
RESTORE_CALLERS_STACK
- addw $2,%sp /* dump vector number */
- iret /* return from interrupt */
+ /* dump vector number */
+ addw $2,%sp
+
+ /* return from interrupt */
+ iret
/*
************************************************************
je Lvid_cfg
movw $0xffff, %ax
ret
-Lcur_pos: /* Read Cursor Position and Size */
+Lcur_pos:
+ /* Read Cursor Position and Size */
gs movw $0, OFFS_CX(%bp)
gs movw $0, OFFS_DX(%bp)
xorw %ax, %ax
ret
-Lvid_state: /* Get Video State */
-gs movw $(80 << 8|0x03), OFFS_AX(%bp) /* 80 columns, 80x25, 16 colors */
+Lvid_state:
+ /* Get Video State - 80 columns, 80x25, 16 colors */
+gs movw $(80 << 8|0x03), OFFS_AX(%bp)
gs movw $0, OFFS_BX(%bp)
xorw %ax, %ax
ret
-Lvid_cfg: /* Video Subsystem Configuration (EGA/VGA) */
-gs movw $0x10, OFFS_BX(%bp) /* indicate CGA/MDA/HGA */
+Lvid_cfg:
+ /* Video Subsystem Configuration (EGA/VGA) - indicate CGA/MDA/HGA */
+gs movw $0x10, OFFS_BX(%bp)
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 11h -- Equipment determination
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 12h -- Get Memory Size
b12_more_than_640k:
movw $0x280, %ax
b12_return:
-gs movw %ax, OFFS_AX(%bp) /* return number of kilobytes in ax */
+ /* return number of kilobytes in ax */
+gs movw %ax, OFFS_AX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 13h -- Disk services
ret
Lfunc_15h:
gs movw OFFS_AX(%bp), %ax
- andw $0xff, %ax /* return AH=0->drive not present */
+
+ /* return AH=0->drive not present */
+ andw $0x00ff, %ax
gs movw %ax, OFFS_AX(%bp)
xorw %ax, %ax
ret
-
/*
***********************************************************
* BIOS interrupt 15h -- Miscellaneous services
movw $0xffff, %ax
ret
-Lfunc_c0h: /* Return System Configuration Parameters (PS2 only) */
+Lfunc_c0h:
+ /* Return System Configuration Parameters (PS2 only) */
gs movw OFFS_FLAGS(%bp), %ax
- orw $1, %ax /* return carry -- function not supported */
+
+ /* return carry -- function not supported */
+ orw $1, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
cmpw $1, %ax
je Lfunc_e801h
gs movw OFFS_FLAGS(%bp), %ax
- orw $1, %ax /* return carry -- function not supported */
+
+ /* return carry -- function not supported */
+ orw $1, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-Lfunc_e801h: /* Get memory size for >64M Configurations */
+Lfunc_e801h:
+ /* Get memory size for >64M Configurations */
cs movw ram_in_64kb_chunks, %ax
cmpw $0x100, %ax
ja e801_more_than_16mb
- shlw $6, %ax /* multiply by 64 */
- subw $0x400, %ax /* 1st meg does not count */
-gs movw %ax, OFFS_AX(%bp) /* return memory size between 1M and 16M in 1kb chunks in AX and CX */
+ /* multiply by 64 */
+ shlw $6, %ax
+
+ /* 1st meg does not count */
+ subw $0x400, %ax
+
+ /* return memory size between 1M and 16M in 1kb chunks in AX and CX */
+gs movw %ax, OFFS_AX(%bp)
gs movw %ax, OFFS_CX(%bp)
-gs movw $0, OFFS_BX(%bp) /* set BX and DX to 0*/
+
+ /* set BX and DX to 0*/
+gs movw $0, OFFS_BX(%bp)
gs movw $0, OFFS_DX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
e801_more_than_16mb:
- subw $0x100, %ax /* subtract 16MB */
+ /* subtract 16MB */
+ subw $0x100, %ax
-gs movw $0x3c00, OFFS_AX(%bp) /* return 0x3c00 (16MB-1MB) in AX and CX */
+ /* return 0x3c00 (16MB-1MB) in AX and CX */
+gs movw $0x3c00, OFFS_AX(%bp)
gs movw $0x3c00, OFFS_CX(%bp)
-gs movw %ax, OFFS_BX(%bp) /* set BX and DX to number of 64kb chunks above 16MB */
+
+ /* set BX and DX to number of 64kb chunks above 16MB */
+gs movw %ax, OFFS_BX(%bp)
gs movw %ax, OFFS_DX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
movw $0x100, %ax
b88_not_more_than16:
shlw $6, %ax
- subw $0x400, %ax /* 1st meg does not count */
-gs movw %ax, OFFS_AX(%bp) /* return number of kilobytes between 16MB and 16MB in ax */
+ /* 1st meg does not count */
+ subw $0x400, %ax
+
+ /* return number of kilobytes between 16MB and 16MB in ax */
+gs movw %ax, OFFS_AX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 16h -- keyboard services
movw $0xffff, %ax
ret
Lfunc_03h:
- xorw %ax, %ax /* do nothing -- function not supported */
+ /* do nothing -- function not supported */
+ xorw %ax, %ax
ret
/*
ret
Lfunc_b1h:
call realmode_pci_bios
- xorw %ax, %ax /* do nothing -- function not supported */
+
+ /* do nothing -- function not supported */
+ xorw %ax, %ax
ret
#include <common.h>
#include <watchdog.h>
-#include <command.h>
#include <stdio_dev.h>
-#include <version.h>
-#include <malloc.h>
-#include <net.h>
-#include <ide.h>
-#include <serial.h>
#include <asm/u-boot-x86.h>
-#include <elf.h>
+#include <asm/relocate.h>
-#ifdef CONFIG_BITBANGMII
-#include <miiphy.h>
-#endif
-
-/*
- * Pointer to initial global data area
- *
- * Here we initialize it.
- */
-#undef XTRN_DECLARE_GLOBAL_DATA_PTR
-#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
-DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
-
-/************************************************************************
- * Init Utilities *
- ************************************************************************
- * Some of this code should be moved into the core functions,
- * or dropped completely,
- * but let's get it working (again) first...
- */
-static int init_baudrate(void)
-{
- gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
- return 0;
-}
-
-static int display_banner(void)
-{
-
- printf("\n\n%s\n\n", version_string);
-
- return 0;
-}
-
-static int display_dram_config(void)
-{
- int i;
-
- puts("DRAM Configuration:\n");
-
- for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
- printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
- print_size(gd->bd->bi_dram[i].size, "\n");
- }
-
- return 0;
-}
-
-#ifndef CONFIG_SYS_NO_FLASH
-static void display_flash_config(ulong size)
-{
- puts("Flash: ");
- print_size(size, "\n");
-}
-#endif
+#include <asm/init_helpers.h>
+#include <asm/init_wrappers.h>
/*
* Breath some life into the board...
*
- * Initialize an SMC for serial comms, and carry out some hardware
- * tests.
+ * Getting the board up and running is a three-stage process:
+ * 1) Execute from Flash, SDRAM Uninitialised
+ * At this point, there is a limited amount of non-SDRAM memory
+ * (typically the CPU cache, but can also be SRAM or even a buffer of
+ * of some peripheral). This limited memory is used to hold:
+ * - The initial copy of the Global Data Structure
+ * - A temporary stack
+ * - A temporary x86 Global Descriptor Table
+ * - The pre-console buffer (if enabled)
+ *
+ * The following is performed during this phase of execution:
+ * - Core low-level CPU initialisation
+ * - Console initialisation
+ * - SDRAM initialisation
+ *
+ * 2) Execute from Flash, SDRAM Initialised
+ * At this point we copy Global Data from the initial non-SDRAM
+ * memory and set up the permanent stack in SDRAM. The CPU cache is no
+ * longer being used as temporary memory, so we can now fully enable
+ * it.
*
- * The first part of initialization is running from Flash memory;
- * its main purpose is to initialize the RAM so that we
- * can relocate the monitor code to RAM.
+ * The following is performed during this phase of execution:
+ * - Create final stack in SDRAM
+ * - Copy Global Data from temporary memory to SDRAM
+ * - Enabling of CPU cache(s),
+ * - Copying of U-Boot code and data from Flash to RAM
+ * - Clearing of the BSS
+ * - ELF relocation adjustments
+ *
+ * 3) Execute from SDRAM
+ * The following is performed during this phase of execution:
+ * - All remaining initialisation
*/
/*
- * All attempts to come up with a "common" initialization sequence
- * that works for all boards and architectures failed: some of the
- * requirements are just _too_ different. To get rid of the resulting
- * mess of board dependend #ifdef'ed code we now make the whole
- * initialization sequence configurable to the user.
- *
- * The requirements for any new initalization function is simple: it
- * receives a pointer to the "global data" structure as it's only
- * argument, and returns an integer return code, where 0 means
- * "continue" and != 0 means "fatal error, hang the system".
+ * The requirements for any new initalization function is simple: it is
+ * a function with no parameters which returns an integer return code,
+ * where 0 means "continue" and != 0 means "fatal error, hang the system"
*/
typedef int (init_fnc_t) (void);
-static int calculate_relocation_address(void);
-static int copy_uboot_to_ram(void);
-static int clear_bss(void);
-static int do_elf_reloc_fixups(void);
-
+/*
+ * init_sequence_f is the list of init functions which are run when U-Boot
+ * is executing from Flash with a limited 'C' environment. The following
+ * limitations must be considered when implementing an '_f' function:
+ * - 'static' variables are read-only
+ * - Global Data (gd->xxx) is read/write
+ * - Stack space is limited
+ *
+ * The '_f' sequence must, as a minimum, initialise SDRAM. It _should_
+ * also initialise the console (to provide early debug output)
+ */
init_fnc_t *init_sequence_f[] = {
cpu_init_f,
board_early_init_f,
env_init,
- init_baudrate,
+ init_baudrate_f,
serial_init,
console_init_f,
dram_init_f,
calculate_relocation_address,
+
+ NULL,
+};
+
+/*
+ * init_sequence_f_r is the list of init functions which are run when
+ * U-Boot is executing from Flash with a semi-limited 'C' environment.
+ * The following limitations must be considered when implementing an
+ * '_f_r' function:
+ * - 'static' variables are read-only
+ * - Global Data (gd->xxx) is read/write
+ *
+ * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
+ * supported). It _should_, if possible, copy global data to RAM and
+ * initialise the CPU caches (to speed up the relocation process)
+ */
+init_fnc_t *init_sequence_f_r[] = {
+ copy_gd_to_ram_f_r,
+ init_cache_f_r,
copy_uboot_to_ram,
clear_bss,
do_elf_reloc_fixups,
NULL,
};
+/*
+ * init_sequence_r is the list of init functions which are run when U-Boot
+ * is executing from RAM with a full 'C' environment. There are no longer
+ * any limitations which must be considered when implementing an '_r'
+ * function, (i.e.'static' variables are read/write)
+ *
+ * If not already done, the '_r' sequence must copy global data to RAM and
+ * (should) initialise the CPU caches.
+ */
init_fnc_t *init_sequence_r[] = {
- cpu_init_r, /* basic cpu dependent setup */
- board_early_init_r, /* basic board dependent setup */
- dram_init, /* configure available RAM banks */
- interrupt_init, /* set up exceptions */
+ set_reloc_flag_r,
+ init_bd_struct_r,
+ mem_malloc_init_r,
+ cpu_init_r,
+ board_early_init_r,
+ dram_init,
+ interrupt_init,
timer_init,
display_banner,
display_dram_config,
-
- NULL,
-};
-
-gd_t *gd;
-
-static int calculate_relocation_address(void)
-{
- ulong text_start = (ulong)&__text_start;
- ulong bss_end = (ulong)&__bss_end;
- ulong dest_addr;
- ulong rel_offset;
-
- /* Calculate destination RAM Address and relocation offset */
- dest_addr = gd->ram_size;
- dest_addr -= CONFIG_SYS_STACK_SIZE;
- dest_addr -= (bss_end - text_start);
-
- /*
- * Round destination address down to 16-byte boundary to keep
- * IDT and GDT 16-byte aligned
- */
- dest_addr &= ~15;
-
- rel_offset = dest_addr - text_start;
-
- gd->start_addr_sp = gd->ram_size;
- gd->relocaddr = dest_addr;
- gd->reloc_off = rel_offset;
-
- return 0;
-}
-
-static int copy_uboot_to_ram(void)
-{
- ulong *dst_addr = (ulong *)gd->relocaddr;
- ulong *src_addr = (ulong *)&__text_start;
- ulong *end_addr = (ulong *)&__data_end;
-
- while (src_addr < end_addr)
- *dst_addr++ = *src_addr++;
-
- return 0;
-}
-
-static int clear_bss(void)
-{
- void *bss_start = &__bss_start;
- void *bss_end = &__bss_end;
-
- ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
- ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);
-
- while (dst_addr < end_addr)
- *dst_addr++ = 0x00000000;
-
- return 0;
-}
-
-static int do_elf_reloc_fixups(void)
-{
- Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
- Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
-
- Elf32_Addr *offset_ptr_rom;
- Elf32_Addr *offset_ptr_ram;
-
- /* The size of the region of u-boot that runs out of RAM. */
- uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
-
- do {
- /* Get the location from the relocation entry */
- offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
-
- /* Check that the location of the relocation is in .text */
- if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) {
-
- /* Switch to the in-RAM version */
- offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
- gd->reloc_off);
-
- /* Check that the target points into .text */
- if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
- *offset_ptr_ram <
- (CONFIG_SYS_TEXT_BASE + size)) {
- *offset_ptr_ram += gd->reloc_off;
- }
- }
- } while (re_src++ < re_end);
-
- return 0;
-}
-
-/* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
-void board_init_f(ulong boot_flags)
-{
- init_fnc_t **init_fnc_ptr;
-
- gd->flags = boot_flags;
-
- for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
- if ((*init_fnc_ptr)() != 0)
- hang();
- }
-
- gd->flags |= GD_FLG_RELOC;
-
- /* Enter the relocated U-Boot! */
- relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
-
- /* NOTREACHED - relocate_code() does not return */
- while (1)
- ;
-}
-
-void board_init_r(gd_t *id, ulong dest_addr)
-{
-#if defined(CONFIG_CMD_NET)
- char *s;
-#endif
-#ifndef CONFIG_SYS_NO_FLASH
- ulong size;
-#endif
- static bd_t bd_data;
- static gd_t gd_data;
- init_fnc_t **init_fnc_ptr;
-
- show_boot_progress(0x21);
-
- /* Global data pointer is now writable */
- gd = &gd_data;
- memcpy(gd, id, sizeof(gd_t));
-
- /* compiler optimization barrier needed for GCC >= 3.4 */
- __asm__ __volatile__("" : : : "memory");
-
- gd->bd = &bd_data;
- memset(gd->bd, 0, sizeof(bd_t));
- show_boot_progress(0x22);
-
- gd->baudrate = CONFIG_BAUDRATE;
-
- mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
- CONFIG_SYS_MALLOC_LEN);
-
- for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
- if ((*init_fnc_ptr)() != 0)
- hang();
- }
- show_boot_progress(0x23);
-
#ifdef CONFIG_SERIAL_MULTI
- serial_initialize();
+ serial_initialize_r,
#endif
-
#ifndef CONFIG_SYS_NO_FLASH
- /* configure available FLASH banks */
- size = flash_init();
- display_flash_config(size);
- show_boot_progress(0x24);
+ flash_init_r,
#endif
-
- show_boot_progress(0x25);
-
- /* initialize environment */
- env_relocate();
- show_boot_progress(0x26);
-
-
+ env_relocate_r,
#ifdef CONFIG_CMD_NET
- /* IP Address */
- bd_data.bi_ip_addr = getenv_IPaddr("ipaddr");
+ init_ip_address_r,
#endif
-
-#if defined(CONFIG_PCI)
- /*
- * Do pci configuration
- */
- pci_init();
+#ifdef CONFIG_PCI
+ pci_init_r,
#endif
-
- show_boot_progress(0x27);
-
-
- stdio_init();
-
- jumptable_init();
-
- /* Initialize the console (after the relocation and devices init) */
- console_init_r();
-
+ stdio_init,
+ jumptable_init_r,
+ console_init_r,
#ifdef CONFIG_MISC_INIT_R
- /* miscellaneous platform dependent initialisations */
- misc_init_r();
+ misc_init_r,
#endif
-
#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
- WATCHDOG_RESET();
- puts("PCMCIA:");
- pcmcia_init();
+ pci_init_r,
#endif
-
#if defined(CONFIG_CMD_KGDB)
- WATCHDOG_RESET();
- puts("KGDB: ");
- kgdb_init();
+ kgdb_init_r,
#endif
-
- /* enable exceptions */
- enable_interrupts();
- show_boot_progress(0x28);
-
+ enable_interrupts_r,
#ifdef CONFIG_STATUS_LED
- status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
+ status_led_set_r,
#endif
-
- udelay(20);
-
- /* Initialize from environment */
- load_addr = getenv_ulong("loadaddr", 16, load_addr);
+ set_load_addr_r,
#if defined(CONFIG_CMD_NET)
- s = getenv("bootfile");
-
- if (s != NULL)
- copy_filename(BootFile, s, sizeof(BootFile));
+ set_bootfile_r,
#endif
-
- WATCHDOG_RESET();
-
#if defined(CONFIG_CMD_IDE)
- WATCHDOG_RESET();
- puts("IDE: ");
- ide_init();
+ ide_init_r,
#endif
-
#if defined(CONFIG_CMD_SCSI)
- WATCHDOG_RESET();
- puts("SCSI: ");
- scsi_init();
+ scsi_init_r,
#endif
-
#if defined(CONFIG_CMD_DOC)
- WATCHDOG_RESET();
- puts("DOC: ");
- doc_init();
+ doc_init_r,
#endif
-
#ifdef CONFIG_BITBANGMII
- bb_miiphy_init();
+ bb_miiphy_init_r,
#endif
#if defined(CONFIG_CMD_NET)
- WATCHDOG_RESET();
- puts("Net: ");
- eth_initialize(gd->bd);
+ eth_initialize_r,
+#ifdef CONFIG_RESET_PHY_R
+ reset_phy_r,
#endif
-
-#if (defined(CONFIG_CMD_NET)) && (0)
- WATCHDOG_RESET();
-# ifdef DEBUG
- puts("Reset Ethernet PHY\n");
-# endif
- reset_phy();
#endif
-
#ifdef CONFIG_LAST_STAGE_INIT
- WATCHDOG_RESET();
- /*
- * Some parts can be only initialized if all others (like
- * Interrupts) are up and running (i.e. the PC-style ISA
- * keyboard).
- */
- last_stage_init();
+ last_stage_init,
#endif
+ NULL,
+};
+static void do_init_loop(init_fnc_t **init_fnc_ptr)
+{
+ for (; *init_fnc_ptr; ++init_fnc_ptr) {
+ WATCHDOG_RESET();
+ if ((*init_fnc_ptr)() != 0)
+ hang();
+ }
+}
-#ifdef CONFIG_POST
- post_run(NULL, POST_RAM | post_bootmode_get(0));
-#endif
-
- show_boot_progress(0x29);
+void board_init_f(ulong boot_flags)
+{
+ gd->flags = boot_flags;
- /* main_loop() can return to retry autoboot, if so just run it again. */
- for (;;)
- main_loop();
+ do_init_loop(init_sequence_f);
- /* NOTREACHED - no way out of command loop except booting */
-}
+ /*
+ * SDRAM and console are now initialised. The final stack can now
+ * be setup in SDRAM. Code execution will continue in Flash, but
+ * with the stack in SDRAM and Global Data in temporary memory
+ * (CPU cache)
+ */
+ board_init_f_r_trampoline(gd->start_addr_sp);
-void hang(void)
-{
- puts("### ERROR ### Please RESET the board ###\n");
- for (;;)
+ /* NOTREACHED - board_init_f_r_trampoline() does not return */
+ while (1)
;
}
-unsigned long do_go_exec(ulong (*entry)(int, char * const []),
- int argc, char * const argv[])
+void board_init_f_r(void)
{
- unsigned long ret = 0;
- char **argv_tmp;
+ do_init_loop(init_sequence_f_r);
/*
- * x86 does not use a dedicated register to pass the pointer to
- * the global_data, so it is instead passed as argv[-1]. By using
- * argv[-1], the called 'Application' can use the contents of
- * argv natively. However, to safely use argv[-1] a new copy of
- * argv is needed with the extra element
+ * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
+ * Transfer execution from Flash to RAM by calculating the address
+ * of the in-RAM copy of board_init_r() and calling it
*/
- argv_tmp = malloc(sizeof(char *) * (argc + 1));
+ (board_init_r + gd->reloc_off)(gd, gd->relocaddr);
- if (argv_tmp) {
- argv_tmp[0] = (char *)gd;
+ /* NOTREACHED - board_init_r() does not return */
+ while (1)
+ ;
+}
- memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+ do_init_loop(init_sequence_r);
- ret = (entry) (argc, &argv_tmp[1]);
- free(argv_tmp);
- }
+ /* main_loop() can return to retry autoboot, if so just run it again. */
+ for (;;)
+ main_loop();
- return ret;
+ /* NOTREACHED - no way out of command loop except booting */
}
-void setup_pcat_compatibility(void)
- __attribute__((weak, alias("__setup_pcat_compatibility")));
-
-void __setup_pcat_compatibility(void)
+void hang(void)
{
+ puts("### ERROR ### Please RESET the board ###\n");
+ for (;;)
+ ;
}
--- /dev/null
+/*
+ * (C) Copyright 2008-2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <malloc.h>
+#include <asm/u-boot-x86.h>
+
+unsigned long do_go_exec(ulong (*entry)(int, char * const []),
+ int argc, char * const argv[])
+{
+ unsigned long ret = 0;
+ char **argv_tmp;
+
+ /*
+ * x86 does not use a dedicated register to pass the pointer to
+ * the global_data, so it is instead passed as argv[-1]. By using
+ * argv[-1], the called 'Application' can use the contents of
+ * argv natively. However, to safely use argv[-1] a new copy of
+ * argv is needed with the extra element
+ */
+ argv_tmp = malloc(sizeof(char *) * (argc + 1));
+
+ if (argv_tmp) {
+ argv_tmp[0] = (char *)gd;
+
+ memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
+
+ ret = (entry) (argc, &argv_tmp[1]);
+ free(argv_tmp);
+ }
+
+ return ret;
+}
--- /dev/null
+/*
+ * (C) Copyright 2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <command.h>
+#include <stdio_dev.h>
+#include <version.h>
+#include <malloc.h>
+#include <net.h>
+#include <ide.h>
+#include <serial.h>
+#include <status_led.h>
+#include <asm/processor.h>
+#include <asm/u-boot-x86.h>
+
+#include <asm/init_helpers.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/************************************************************************
+ * Init Utilities *
+ ************************************************************************
+ * Some of this code should be moved into the core functions,
+ * or dropped completely,
+ * but let's get it working (again) first...
+ */
+
+int display_banner(void)
+{
+ printf("\n\n%s\n\n", version_string);
+
+ return 0;
+}
+
+int display_dram_config(void)
+{
+ int i;
+
+ puts("DRAM Configuration:\n");
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
+ print_size(gd->bd->bi_dram[i].size, "\n");
+ }
+
+ return 0;
+}
+
+int init_baudrate_f(void)
+{
+ gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
+ return 0;
+}
+
+int calculate_relocation_address(void)
+{
+ ulong text_start = (ulong)&__text_start;
+ ulong bss_end = (ulong)&__bss_end;
+ ulong dest_addr;
+
+ /*
+ * NOTE: All destination address are rounded down to 16-byte
+ * boundary to satisfy various worst-case alignment
+ * requirements
+ */
+
+ /* Global Data is at top of available memory */
+ dest_addr = gd->ram_size;
+ dest_addr -= GENERATED_GBL_DATA_SIZE;
+ dest_addr &= ~15;
+ gd->new_gd_addr = dest_addr;
+
+ /* GDT is below Global Data */
+ dest_addr -= X86_GDT_SIZE;
+ dest_addr &= ~15;
+ gd->gdt_addr = dest_addr;
+
+ /* Stack is below GDT */
+ gd->start_addr_sp = dest_addr;
+
+ /* U-Boot is below the stack */
+ dest_addr -= CONFIG_SYS_STACK_SIZE;
+ dest_addr -= (bss_end - text_start);
+ dest_addr &= ~15;
+ gd->relocaddr = dest_addr;
+ gd->reloc_off = (dest_addr - text_start);
+
+ return 0;
+}
+
+int copy_gd_to_ram_f_r(void)
+{
+ gd_t *ram_gd;
+
+ /*
+ * Global data is still in temporary memory (the CPU cache).
+ * calculate_relocation_address() has set gd->new_gd_addr to
+ * where the global data lives in RAM but getting it there
+ * safely is a bit tricky due to the 'F-Segment Hack' that
+ * we need to use for x86
+ */
+ ram_gd = (gd_t *)gd->new_gd_addr;
+ memcpy((void *)ram_gd, gd, sizeof(gd_t));
+
+ /*
+ * Reload the Global Descriptor Table so FS points to the
+ * in-RAM copy of Global Data (calculate_relocation_address()
+ * has already calculated the in-RAM location of the GDT)
+ */
+ ram_gd->gd_addr = (ulong)ram_gd;
+ init_gd(ram_gd, (u64 *)gd->gdt_addr);
+
+ return 0;
+}
+
+int init_cache_f_r(void)
+{
+ /* Initialise the CPU cache(s) */
+ return init_cache();
+}
+
+int set_reloc_flag_r(void)
+{
+ gd->flags = GD_FLG_RELOC;
+
+ return 0;
+}
+
+int mem_malloc_init_r(void)
+{
+ mem_malloc_init(((gd->relocaddr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
+ CONFIG_SYS_MALLOC_LEN);
+
+ return 0;
+}
+
+bd_t bd_data;
+
+int init_bd_struct_r(void)
+{
+ gd->bd = &bd_data;
+ memset(gd->bd, 0, sizeof(bd_t));
+
+ return 0;
+}
+
+#ifndef CONFIG_SYS_NO_FLASH
+int flash_init_r(void)
+{
+ ulong size;
+
+ puts("Flash: ");
+
+ /* configure available FLASH banks */
+ size = flash_init();
+
+ print_size(size, "\n");
+
+ return 0;
+}
+#endif
+
+int init_ip_address_r(void)
+{
+ /* IP Address */
+ bd_data.bi_ip_addr = getenv_IPaddr("ipaddr");
+
+ return 0;
+}
+
+#ifdef CONFIG_STATUS_LED
+int status_led_set_r(void)
+{
+ status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
+
+ return 0;
+}
+#endif
+
+int set_bootfile_r(void)
+{
+ char *s;
+
+ s = getenv("bootfile");
+
+ if (s != NULL)
+ copy_filename(BootFile, s, sizeof(BootFile));
+
+ return 0;
+}
+
+int set_load_addr_r(void)
+{
+ /* Initialize from environment */
+ load_addr = getenv_ulong("loadaddr", 16, load_addr);
+
+ return 0;
+}
--- /dev/null
+/*
+ * (C) Copyright 2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <serial.h>
+#include <kgdb.h>
+#include <scsi.h>
+#include <post.h>
+#include <miiphy.h>
+
+#include <asm/init_wrappers.h>
+
+int serial_initialize_r(void)
+{
+ serial_initialize();
+
+ return 0;
+}
+
+int env_relocate_r(void)
+{
+ /* initialize environment */
+ env_relocate();
+
+ return 0;
+}
+
+
+int pci_init_r(void)
+{
+ /* Do pci configuration */
+ pci_init();
+
+ return 0;
+}
+
+int jumptable_init_r(void)
+{
+ jumptable_init();
+
+ return 0;
+}
+
+int pcmcia_init_r(void)
+{
+ puts("PCMCIA:");
+ pcmcia_init();
+
+ return 0;
+}
+
+int kgdb_init_r(void)
+{
+ puts("KGDB: ");
+ kgdb_init();
+
+ return 0;
+}
+
+int enable_interrupts_r(void)
+{
+ /* enable exceptions */
+ enable_interrupts();
+
+ return 0;
+}
+
+int eth_initialize_r(void)
+{
+ puts("Net: ");
+ eth_initialize(gd->bd);
+
+ return 0;
+}
+
+int reset_phy_r(void)
+{
+#ifdef DEBUG
+ puts("Reset Ethernet PHY\n");
+#endif
+ reset_phy();
+
+ return 0;
+}
+
+int ide_init_r(void)
+{
+ puts("IDE: ");
+ ide_init();
+
+ return 0;
+}
+
+int scsi_init_r(void)
+{
+ puts("SCSI: ");
+ scsi_init();
+
+ return 0;
+}
+
+#ifdef CONFIG_BITBANGMII
+int bb_miiphy_init_r(void)
+{
+ bb_miiphy_init();
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_POST
+int post_run_r(void)
+{
+ post_run(NULL, POST_RAM | post_bootmode_get(0));
+
+ return 0;
+}
+#endif
* e40 ss;
*/
-#define a32 .byte 0x67; /* address size prefix 32 */
-#define o32 .byte 0x66; /* operand size prefix 32 */
+#define a32 .byte 0x67; /* address size prefix 32 */
+#define o32 .byte 0x66; /* operand size prefix 32 */
.section .realmode, "ax"
.code16
- /* 16bit protected mode code here */
+
+ /* 16bit protected mode code here */
.globl realmode_enter
realmode_enter:
o32 pusha
movw %ax, %gs
lidt realmode_idt_ptr
- movl %cr0, %eax /* Go back into real mode by */
- andl $0x7ffffffe, %eax /* clearing PE to 0 */
+ /* Go back into real mode by clearing PE to 0 */
+ movl %cr0, %eax
+ andl $0x7ffffffe, %eax
movl %eax, %cr0
- ljmp $0x0,$do_realmode /* switch to real mode */
-do_realmode: /* realmode code from here */
+ /* switch to real mode */
+ ljmp $0x0,$do_realmode
+
+do_realmode:
+ /* realmode code from here */
movw %cs,%ax
movw %ax,%ds
movw %ax,%es
movw %ax,%fs
movw %ax,%gs
- /* create a temporary stack */
-
+ /* create a temporary stack */
movw $0xc0, %ax
movw %ax, %ss
movw $0x200, %ax
popw %ss
movl %eax, %esp
cs movl temp_eax, %eax
- wbinvd /* self-modifying code,
- * better flush the cache */
+
+ /* self-modifying code, better flush the cache */
+ wbinvd
.byte 0x9a /* lcall */
temp_ip:
.word 0 /* new ip */
temp_cs:
.word 0 /* new cs */
+
realmode_ret:
- /* save eax, esp and ss */
+ /* save eax, esp and ss */
cs movl %eax, saved_eax
movl %esp, %eax
cs movl %eax, saved_esp
movw %ss, %ax
cs movw %ax, saved_ss
- /* restore the stack, note that we set sp to 0x244;
+ /*
+ * restore the stack, note that we set sp to 0x244;
* pt_regs is 0x44 bytes long and we push the structure
- * backwards on to the stack, bottom first */
-
+ * backwards on to the stack, bottom first
+ */
movw $0xc0, %ax
movw %ax, %ss
movw $0x244, %ax
pushl %ebx
o32 cs lidt saved_idt
-o32 cs lgdt saved_gdt /* Set GDTR */
+o32 cs lgdt saved_gdt
- movl %cr0, %eax /* Go back into protected mode */
- orl $1,%eax /* reset PE to 1 */
+ /* Go back into protected mode reset PE to 1 */
+ movl %cr0, %eax
+ orl $1,%eax
movl %eax, %cr0
- jmp next_line /* flush prefetch queue */
+
+ /* flush prefetch queue */
+ jmp next_line
next_line:
movw $return_ptr, %ax
movw %ax,%bp
.code32
protected_mode:
- movl $0x18,%eax /* reload GDT[3] */
- movw %ax,%fs /* reset FS */
- movw %ax,%ds /* reset DS */
- movw %ax,%gs /* reset GS */
- movw %ax,%es /* reset ES */
- movw %ax,%ss /* reset SS */
+ /* Reload segment registers */
+ movl $0x18, %eax
+ movw %ax, %fs
+ movw %ax, %ds
+ movw %ax, %gs
+ movw %ax, %es
+ movw %ax, %ss
movl saved_protected_mode_esp, %eax
movl %eax, %esp
popf
--- /dev/null
+/*
+ * (C) Copyright 2008-2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <asm/u-boot-x86.h>
+#include <asm/relocate.h>
+#include <elf.h>
+
+int copy_uboot_to_ram(void)
+{
+ size_t len = (size_t)&__data_end - (size_t)&__text_start;
+
+ memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
+
+ return 0;
+}
+
+int clear_bss(void)
+{
+ ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
+ size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
+
+ memset((void *)dst_addr, 0x00, len);
+
+ return 0;
+}
+
+int do_elf_reloc_fixups(void)
+{
+ Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
+ Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
+
+ Elf32_Addr *offset_ptr_rom;
+ Elf32_Addr *offset_ptr_ram;
+
+ /* The size of the region of u-boot that runs out of RAM. */
+ uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
+
+ do {
+ /* Get the location from the relocation entry */
+ offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
+
+ /* Check that the location of the relocation is in .text */
+ if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) {
+
+ /* Switch to the in-RAM version */
+ offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
+ gd->reloc_off);
+
+ /* Check that the target points into .text */
+ if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
+ *offset_ptr_ram <
+ (CONFIG_SYS_TEXT_BASE + size)) {
+ *offset_ptr_ram += gd->reloc_off;
+ }
+ }
+ } while (re_src++ < re_end);
+
+ return 0;
+}
return dstpp;
}
+
+#define OP_T_THRES 8
+#define OPSIZ (sizeof(op_t))
+
+#define BYTE_COPY_FWD(dst_bp, src_bp, nbytes) \
+do { \
+ int __d0; \
+ asm volatile( \
+ /* Clear the direction flag, so copying goes forward. */ \
+ "cld\n" \
+ /* Copy bytes. */ \
+ "rep\n" \
+ "movsb" : \
+ "=D" (dst_bp), "=S" (src_bp), "=c" (__d0) : \
+ "0" (dst_bp), "1" (src_bp), "2" (nbytes) : \
+ "memory"); \
+} while (0)
+
+#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
+do { \
+ int __d0; \
+ asm volatile( \
+ /* Clear the direction flag, so copying goes forward. */ \
+ "cld\n" \
+ /* Copy longwords. */ \
+ "rep\n" \
+ "movsl" : \
+ "=D" (dst_bp), "=S" (src_bp), "=c" (__d0) : \
+ "0" (dst_bp), "1" (src_bp), "2" ((nbytes) / 4) : \
+ "memory"); \
+ (nbytes_left) = (nbytes) % 4; \
+} while (0)
+
+void *memcpy(void *dstpp, const void *srcpp, size_t len)
+{
+ unsigned long int dstp = (long int)dstpp;
+ unsigned long int srcp = (long int)srcpp;
+
+ /* Copy from the beginning to the end. */
+
+ /* If there not too few bytes to copy, use word copy. */
+ if (len >= OP_T_THRES) {
+ /* Copy just a few bytes to make DSTP aligned. */
+ len -= (-dstp) % OPSIZ;
+ BYTE_COPY_FWD(dstp, srcp, (-dstp) % OPSIZ);
+
+ /* Copy from SRCP to DSTP taking advantage of the known
+ * alignment of DSTP. Number of bytes remaining is put
+ * in the third argument, i.e. in LEN. This number may
+ * vary from machine to machine.
+ */
+ WORD_COPY_FWD(dstp, srcp, len, len);
+
+ /* Fall out and copy the tail. */
+ }
+
+ /* There are just a few bytes to copy. Use byte memory operations. */
+ BYTE_COPY_FWD(dstp, srcp, len);
+
+ return dstpp;
+}
#endif
}
+void setup_pcat_compatibility(void)
+ __attribute__((weak, alias("__setup_pcat_compatibility")));
+
+void __setup_pcat_compatibility(void)
+{
+}
+
int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
struct boot_params *base_ptr;
projects / oweals / u-boot.git / commitdiff