Introduce generic pre-relocation board_f.c
authorSimon Glass <sjg@chromium.org>
Mon, 11 Mar 2013 06:49:53 +0000 (06:49 +0000)
committerTom Rini <trini@ti.com>
Fri, 15 Mar 2013 20:13:59 +0000 (16:13 -0400)
This file handles common pre-relocation init for boards which use
the generic framework.

It starts up the console, DRAM, performs relocation and then jumps
to post-relocation init.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
arch/x86/lib/board.c
arch/x86/lib/init_helpers.c
arch/x86/lib/relocate.c
common/Makefile
common/board_f.c [new file with mode: 0644]
include/asm-generic/global_data.h
include/common.h

index 2441a66ae226dee55e029f0d26777791d3fd7615..555301a24e3e8330ce511100a837f570f45b3f7a 100644 (file)
@@ -219,7 +219,7 @@ static void do_init_loop(init_fnc_t **init_fnc_ptr)
 
 void board_init_f(ulong boot_flags)
 {
-       gd->fdt_blob = gd->arch.new_fdt = NULL;
+       gd->fdt_blob = gd->new_fdt = NULL;
        gd->flags = boot_flags;
 
        do_init_loop(init_sequence_f);
index 414fdcc4c901bd4599eb2a5ef64b241ac490723c..7df9536a4788906230a1d2f525e016d456144b74 100644 (file)
@@ -111,7 +111,7 @@ int calculate_relocation_address(void)
         */
        if (gd->fdt_blob) {
                dest_addr -= fdt_size;
-               gd->arch.new_fdt = (void *)dest_addr;
+               gd->new_fdt = (void *)dest_addr;
                dest_addr &= ~15;
        }
 #endif
index 3e370f2906a277f8a6b7812d028b60609d1880af..e893c2b214f59c9e255304488f0801290c868467 100644 (file)
@@ -49,15 +49,15 @@ int copy_uboot_to_ram(void)
 
 int copy_fdt_to_ram(void)
 {
-       if (gd->arch.new_fdt) {
+       if (gd->new_fdt) {
                ulong fdt_size;
 
                fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
 
-               memcpy(gd->arch.new_fdt, gd->fdt_blob, fdt_size);
+               memcpy(gd->new_fdt, gd->fdt_blob, fdt_size);
                debug("Relocated fdt from %p to %p, size %lx\n",
-                      gd->fdt_blob, gd->arch.new_fdt, fdt_size);
-               gd->fdt_blob = gd->arch.new_fdt;
+                      gd->fdt_blob, gd->new_fdt, fdt_size);
+               gd->fdt_blob = gd->new_fdt;
        }
 
        return 0;
index 719fc231b885e067a6165c3f2bbb771b6a4c8da1..a5f5b1a58860dd70f7fb6d72366c24db0430898c 100644 (file)
@@ -36,6 +36,9 @@ COBJS-y += s_record.o
 COBJS-y += xyzModem.o
 COBJS-y += cmd_disk.o
 
+# boards
+COBJS-$(CONFIG_SYS_GENERIC_BOARD) += board_f.o
+
 # core command
 COBJS-y += cmd_boot.o
 COBJS-$(CONFIG_CMD_BOOTM) += cmd_bootm.o
diff --git a/common/board_f.c b/common/board_f.c
new file mode 100644 (file)
index 0000000..d674f9d
--- /dev/null
@@ -0,0 +1,579 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2002-2006
+ * 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 <linux/compiler.h>
+#include <version.h>
+#include <environment.h>
+#include <fdtdec.h>
+#include <initcall.h>
+#include <logbuff.h>
+#include <post.h>
+#include <asm/io.h>
+#include <asm/sections.h>
+#include <linux/compiler.h>
+
+/*
+ * Pointer to initial global data area
+ *
+ * Here we initialize it if needed.
+ */
+#ifdef XTRN_DECLARE_GLOBAL_DATA_PTR
+#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);
+#else
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+/*
+ * sjg: IMO this code should be
+ * refactored to a single function, something like:
+ *
+ * void led_set_state(enum led_colour_t colour, int on);
+ */
+/************************************************************************
+ * Coloured LED functionality
+ ************************************************************************
+ * May be supplied by boards if desired
+ */
+inline void __coloured_LED_init(void) {}
+void coloured_LED_init(void)
+       __attribute__((weak, alias("__coloured_LED_init")));
+inline void __red_led_on(void) {}
+void red_led_on(void) __attribute__((weak, alias("__red_led_on")));
+inline void __red_led_off(void) {}
+void red_led_off(void) __attribute__((weak, alias("__red_led_off")));
+inline void __green_led_on(void) {}
+void green_led_on(void) __attribute__((weak, alias("__green_led_on")));
+inline void __green_led_off(void) {}
+void green_led_off(void) __attribute__((weak, alias("__green_led_off")));
+inline void __yellow_led_on(void) {}
+void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on")));
+inline void __yellow_led_off(void) {}
+void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off")));
+inline void __blue_led_on(void) {}
+void blue_led_on(void) __attribute__((weak, alias("__blue_led_on")));
+inline void __blue_led_off(void) {}
+void blue_led_off(void) __attribute__((weak, alias("__blue_led_off")));
+
+/*
+ * Why is gd allocated a register? Prior to reloc it might be better to
+ * just pass it around to each function in this file?
+ *
+ * After reloc one could argue that it is hardly used and doesn't need
+ * to be in a register. Or if it is it should perhaps hold pointers to all
+ * global data for all modules, so that post-reloc we can avoid the massive
+ * literal pool we get on ARM. Or perhaps just encourage each module to use
+ * a structure...
+ */
+
+/*
+ * Could the CONFIG_SPL_BUILD infection become a flag in gd?
+ */
+
+static int init_baud_rate(void)
+{
+       gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
+       return 0;
+}
+
+static int display_text_info(void)
+{
+       ulong bss_start, bss_end;
+
+       bss_start = _bss_start_ofs + _TEXT_BASE;
+       bss_end = _bss_end_ofs + _TEXT_BASE;
+       debug("U-Boot code: %08X -> %08lX  BSS: -> %08lX\n",
+             CONFIG_SYS_TEXT_BASE, bss_start, bss_end);
+
+#ifdef CONFIG_MODEM_SUPPORT
+       debug("Modem Support enabled\n");
+#endif
+#ifdef CONFIG_USE_IRQ
+       debug("IRQ Stack: %08lx\n", IRQ_STACK_START);
+       debug("FIQ Stack: %08lx\n", FIQ_STACK_START);
+#endif
+
+       return 0;
+}
+
+static int announce_dram_init(void)
+{
+       puts("DRAM:  ");
+       return 0;
+}
+
+static int show_dram_config(void)
+{
+       ulong size;
+
+#ifdef CONFIG_NR_DRAM_BANKS
+       int i;
+
+       debug("\nRAM Configuration:\n");
+       for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+               size += gd->bd->bi_dram[i].size;
+               debug("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
+#ifdef DEBUG
+               print_size(gd->bd->bi_dram[i].size, "\n");
+#endif
+       }
+       debug("\nDRAM:  ");
+#else
+       size = gd->ram_size;
+#endif
+
+       print_size(size, "\n");
+
+       return 0;
+}
+
+void __dram_init_banksize(void)
+{
+#if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE)
+       gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+       gd->bd->bi_dram[0].size = get_effective_memsize();
+#endif
+}
+
+void dram_init_banksize(void)
+       __attribute__((weak, alias("__dram_init_banksize")));
+
+static int zero_global_data(void)
+{
+       memset((void *)gd, '\0', sizeof(gd_t));
+
+       return 0;
+}
+
+static int setup_mon_len(void)
+{
+       gd->mon_len = _bss_end_ofs;
+       return 0;
+}
+
+__weak int arch_cpu_init(void)
+{
+       return 0;
+}
+
+static int setup_fdt(void)
+{
+#ifdef CONFIG_OF_EMBED
+       /* Get a pointer to the FDT */
+       gd->fdt_blob = _binary_dt_dtb_start;
+#elif defined CONFIG_OF_SEPARATE
+       /* FDT is at end of image */
+       gd->fdt_blob = (void *)(_end_ofs + CONFIG_SYS_TEXT_BASE);
+#endif
+       /* Allow the early environment to override the fdt address */
+       gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
+                                               (uintptr_t)gd->fdt_blob);
+       return 0;
+}
+
+/* Get the top of usable RAM */
+__weak ulong board_get_usable_ram_top(ulong total_size)
+{
+       return gd->ram_top;
+}
+
+static int setup_dest_addr(void)
+{
+       debug("Monitor len: %08lX\n", gd->mon_len);
+       /*
+        * Ram is setup, size stored in gd !!
+        */
+       debug("Ram size: %08lX\n", (ulong)gd->ram_size);
+#if defined(CONFIG_SYS_MEM_TOP_HIDE)
+       /*
+        * Subtract specified amount of memory to hide so that it won't
+        * get "touched" at all by U-Boot. By fixing up gd->ram_size
+        * the Linux kernel should now get passed the now "corrected"
+        * memory size and won't touch it either. This should work
+        * for arch/ppc and arch/powerpc. Only Linux board ports in
+        * arch/powerpc with bootwrapper support, that recalculate the
+        * memory size from the SDRAM controller setup will have to
+        * get fixed.
+        */
+       gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
+#endif
+#ifdef CONFIG_SYS_SDRAM_BASE
+       gd->ram_top = CONFIG_SYS_SDRAM_BASE;
+#endif
+       gd->ram_top = board_get_usable_ram_top(gd->mon_len);
+       gd->dest_addr = gd->ram_top;
+       debug("Ram top: %08lX\n", (ulong)gd->ram_top);
+       gd->dest_addr_sp = gd->dest_addr;
+       return 0;
+}
+
+#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
+static int reserve_logbuffer(void)
+{
+       /* reserve kernel log buffer */
+       gd->dest_addr -= LOGBUFF_RESERVE;
+       debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
+               gd->dest_addr);
+       return 0;
+}
+#endif
+
+#ifdef CONFIG_PRAM
+/* reserve protected RAM */
+static int reserve_pram(void)
+{
+       ulong reg;
+
+       reg = getenv_ulong("pram", 10, CONFIG_PRAM);
+       gd->dest_addr -= (reg << 10);           /* size is in kB */
+       debug("Reserving %ldk for protected RAM at %08lx\n", reg,
+             gd->dest_addr);
+       return 0;
+}
+#endif /* CONFIG_PRAM */
+
+/* Round memory pointer down to next 4 kB limit */
+static int reserve_round_4k(void)
+{
+       gd->dest_addr &= ~(4096 - 1);
+       return 0;
+}
+
+#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
+               defined(CONFIG_ARM)
+static int reserve_mmu(void)
+{
+       /* reserve TLB table */
+       gd->arch.tlb_size = 4096 * 4;
+       gd->dest_addr -= gd->arch.tlb_size;
+
+       /* round down to next 64 kB limit */
+       gd->dest_addr &= ~(0x10000 - 1);
+
+       gd->arch.tlb_addr = gd->dest_addr;
+       debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr,
+             gd->arch.tlb_addr + gd->arch.tlb_size);
+       return 0;
+}
+#endif
+
+#ifdef CONFIG_LCD
+static int reserve_lcd(void)
+{
+#ifdef CONFIG_FB_ADDR
+       gd->fb_base = CONFIG_FB_ADDR;
+#else
+       /* reserve memory for LCD display (always full pages) */
+       gd->dest_addr = lcd_setmem(gd->dest_addr);
+       gd->fb_base = gd->dest_addr;
+#endif /* CONFIG_FB_ADDR */
+       return 0;
+}
+#endif /* CONFIG_LCD */
+
+static int reserve_uboot(void)
+{
+       /*
+        * reserve memory for U-Boot code, data & bss
+        * round down to next 4 kB limit
+        */
+       gd->dest_addr -= gd->mon_len;
+       gd->dest_addr &= ~(4096 - 1);
+
+       debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10,
+             gd->dest_addr);
+       return 0;
+}
+
+/* reserve memory for malloc() area */
+static int reserve_malloc(void)
+{
+       gd->dest_addr_sp = gd->dest_addr - TOTAL_MALLOC_LEN;
+       debug("Reserving %dk for malloc() at: %08lx\n",
+                       TOTAL_MALLOC_LEN >> 10, gd->dest_addr_sp);
+       return 0;
+}
+
+/* (permanently) allocate a Board Info struct */
+static int reserve_board(void)
+{
+       gd->dest_addr_sp -= sizeof(bd_t);
+       gd->bd = (bd_t *)gd->dest_addr_sp;
+       memset(gd->bd, '\0', sizeof(bd_t));
+       debug("Reserving %zu Bytes for Board Info at: %08lx\n",
+                       sizeof(bd_t), gd->dest_addr_sp);
+       return 0;
+}
+
+static int setup_machine(void)
+{
+#ifdef CONFIG_MACH_TYPE
+       gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
+#endif
+       return 0;
+}
+
+static int reserve_global_data(void)
+{
+       gd->dest_addr_sp -= sizeof(gd_t);
+       gd->new_gd = (gd_t *)gd->dest_addr_sp;
+       debug("Reserving %zu Bytes for Global Data at: %08lx\n",
+                       sizeof(gd_t), gd->dest_addr_sp);
+       return 0;
+}
+
+static int reserve_fdt(void)
+{
+       /*
+        * If the device tree is sitting immediate above our image then we
+        * must relocate it. If it is embedded in the data section, then it
+        * will be relocated with other data.
+        */
+       if (gd->fdt_blob) {
+               gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
+
+               gd->dest_addr_sp -= gd->fdt_size;
+               gd->new_fdt = (void *)gd->dest_addr_sp;
+               debug("Reserving %lu Bytes for FDT at: %p\n",
+                     gd->fdt_size, gd->new_fdt);
+       }
+
+       return 0;
+}
+
+static int reserve_stacks(void)
+{
+       /* setup stack pointer for exceptions */
+       gd->dest_addr_sp -= 16;
+       gd->dest_addr_sp &= ~0xf;
+       gd->irq_sp = gd->dest_addr_sp;
+
+       /*
+        * Handle architecture-specific things here
+        * TODO(sjg@chromium.org): Perhaps create arch_reserve_stack()
+        * to handle this and put in arch/xxx/lib/stack.c
+        */
+# ifdef CONFIG_ARM
+#  ifdef CONFIG_USE_IRQ
+       gd->dest_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ);
+       debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
+               CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->dest_addr_sp);
+
+       /* 8-byte alignment for ARM ABI compliance */
+       gd->dest_addr_sp &= ~0x07;
+#  endif
+       /* leave 3 words for abort-stack, plus 1 for alignment */
+       gd->dest_addr_sp -= 16;
+
+       return 0;
+}
+
+static int display_new_sp(void)
+{
+       debug("New Stack Pointer is: %08lx\n", gd->dest_addr_sp);
+
+       return 0;
+}
+
+#ifdef CONFIG_POST
+static int init_post(void)
+{
+       post_bootmode_init();
+       post_run(NULL, POST_ROM | post_bootmode_get(0));
+
+       return 0;
+}
+#endif
+
+static int setup_baud_rate(void)
+{
+       /* Ick, can we get rid of this line? */
+       gd->bd->bi_baudrate = gd->baudrate;
+
+       return 0;
+}
+
+static int setup_dram_config(void)
+{
+       /* Ram is board specific, so move it to board code ... */
+       dram_init_banksize();
+
+       return 0;
+}
+
+static int reloc_fdt(void)
+{
+       if (gd->new_fdt) {
+               memcpy(gd->new_fdt, gd->fdt_blob, gd->fdt_size);
+               gd->fdt_blob = gd->new_fdt;
+       }
+
+       return 0;
+}
+
+static int setup_reloc(void)
+{
+       gd->relocaddr = gd->dest_addr;
+       gd->start_addr_sp = gd->dest_addr_sp;
+       gd->reloc_off = gd->dest_addr - CONFIG_SYS_TEXT_BASE;
+       memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));
+
+       debug("Relocation Offset is: %08lx\n", gd->reloc_off);
+       debug("Relocating to %08lx, new gd at %p, sp at %08lx\n",
+             gd->dest_addr, gd->new_gd, gd->dest_addr_sp);
+
+       return 0;
+}
+
+/* ARM calls relocate_code from its crt0.S */
+#if !defined(CONFIG_ARM)
+
+static int jump_to_copy(void)
+{
+       relocate_code(gd->dest_addr_sp, gd->new_gd, gd->dest_addr);
+
+       return 0;
+}
+#endif
+
+/* Record the board_init_f() bootstage (after arch_cpu_init()) */
+static int mark_bootstage(void)
+{
+       bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
+
+       return 0;
+}
+
+static init_fnc_t init_sequence_f[] = {
+       setup_fdt,
+       setup_mon_len,
+       arch_cpu_init,          /* basic arch cpu dependent setup */
+       mark_bootstage,
+#ifdef CONFIG_OF_CONTROL
+       fdtdec_check_fdt,
+#endif
+#if defined(CONFIG_BOARD_EARLY_INIT_F)
+       board_early_init_f,
+#endif
+       timer_init,             /* initialize timer */
+#ifdef CONFIG_BOARD_POSTCLK_INIT
+       board_postclk_init,
+#endif
+#ifdef CONFIG_FSL_ESDHC
+       get_clocks,
+#endif
+       env_init,               /* initialize environment */
+       init_baud_rate,         /* initialze baudrate settings */
+       serial_init,            /* serial communications setup */
+       console_init_f,         /* stage 1 init of console */
+       display_options,        /* say that we are here */
+       display_text_info,      /* show debugging info if required */
+#if defined(CONFIG_DISPLAY_CPUINFO)
+       print_cpuinfo,          /* display cpu info (and speed) */
+#endif
+#if defined(CONFIG_DISPLAY_BOARDINFO)
+       checkboard,             /* display board info */
+#endif
+       announce_dram_init,
+       /* TODO: unify all these dram functions? */
+#ifdef CONFIG_ARM
+       dram_init,              /* configure available RAM banks */
+#endif
+#ifdef CONFIG_POST
+       init_post,
+#endif
+       /*
+        * Now that we have DRAM mapped and working, we can
+        * relocate the code and continue running from DRAM.
+        *
+        * Reserve memory at end of RAM for (top down in that order):
+        *  - area that won't get touched by U-Boot and Linux (optional)
+        *  - kernel log buffer
+        *  - protected RAM
+        *  - LCD framebuffer
+        *  - monitor code
+        *  - board info struct
+        */
+       setup_dest_addr,
+#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
+       reserve_logbuffer,
+#endif
+#ifdef CONFIG_PRAM
+       reserve_pram,
+#endif
+       reserve_round_4k,
+#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
+               defined(CONFIG_ARM)
+       reserve_mmu,
+#endif
+#ifdef CONFIG_LCD
+       reserve_lcd,
+#endif
+       reserve_uboot,
+       reserve_malloc,
+       reserve_board,
+       setup_machine,
+       reserve_global_data,
+       reserve_fdt,
+       reserve_stacks,
+       setup_dram_config,
+       show_dram_config,
+       setup_baud_rate,
+       display_new_sp,
+       reloc_fdt,
+       setup_reloc,
+#ifndef CONFIG_ARM
+       jump_to_copy,
+#endif
+       NULL,
+};
+
+void board_init_f(ulong boot_flags)
+{
+       gd_t data;
+
+       gd = &data;
+
+       gd->flags = boot_flags;
+
+       if (initcall_run_list(init_sequence_f))
+               hang();
+
+#ifndef CONFIG_ARM
+       /* NOTREACHED - jump_to_copy() does not return */
+       hang();
+#endif
+}
+
+void hang(void)
+{
+       puts("### ERROR ### Please RESET the board ###\n");
+       for (;;);
+}
index b8ac024045df073bb5f91e668e95dee2ee913525..ebfe2a324c4c55cdc44eba8a73a19dbc8342baa4 100644 (file)
@@ -81,6 +81,8 @@ typedef struct global_data {
        unsigned long reloc_off;
        struct global_data *new_gd;     /* relocated global data */
        const void *fdt_blob;   /* Our device tree, NULL if none */
+       void *new_fdt;          /* Relocated FDT */
+       unsigned long fdt_size; /* Space reserved for relocated FDT */
        void **jt;              /* jump table */
        char env_buf[32];       /* buffer for getenv() before reloc. */
        struct arch_global_data arch;   /* architecture-specific data */
index 6d5292422596c5df03f93b94a301ac8b20ffe506..2ff8db1694a1605f0ce0d8abd6ad764fa0edfa30 100644 (file)
@@ -311,6 +311,7 @@ extern ulong monitor_flash_len;
 int mac_read_from_eeprom(void);
 extern u8 _binary_dt_dtb_start[];      /* embedded device tree blob */
 int set_cpu_clk_info(void);
+int print_cpuinfo(void);
 
 /**
  * Show the DRAM size in a board-specific way