-TRAP ta 0; nop; nop; nop;
-
-/* Software trap. Treat as BAD_TRAP for the time being... */
-#define SOFT_TRAP TRAP(_hwerr)
-
-#define PSR_INIT 0x1FC0 /* Disable traps, set s and ps */
-#define WIM_INIT 2
-
-/* All traps low-level code here must end with this macro. */
-#define RESTORE_ALL b ret_trap_entry; clr %l6;
-
-#define WRITE_PAUSE nop;nop;nop
+/* This is where the SPARC/LEON3 starts
+ *
+ * Copyright (C) 2007, 2015
+ * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
-WINDOWSIZE = (16 * 4)
-ARGPUSHSIZE = (6 * 4)
-ARGPUSH = (WINDOWSIZE + 4)
-MINFRAME = (WINDOWSIZE + ARGPUSHSIZE + 4)
+#include <asm-offsets.h>
+#include <config.h>
+#include <asm/asmmacro.h>
+#include <asm/winmacro.h>
+#include <asm/psr.h>
+#include <asm/stack.h>
+#include <asm/leon.h>
+#include <ambapp.h>
+
+/* Default Plug&Play I/O area */
+#ifndef CONFIG_AMBAPP_IOAREA
+#define CONFIG_AMBAPP_IOAREA AMBA_DEFAULT_IOAREA
+#endif
-/* Number of register windows */
+/* Default number of SPARC register windows */
#ifndef CONFIG_SYS_SPARC_NWINDOWS
-#error Must define number of SPARC register windows, default is 8
+#define CONFIG_SYS_SPARC_NWINDOWS 8
#endif
-#define STACK_ALIGN 8
-#define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1))
-
- .section ".start", "ax"
- .globl _starttate */
+/* Entry for traps which jump to a programmer-specified trap handler. */
+#define TRAPR(H) \
+ wr %g0, 0xfe0, %psr; \
+ mov %g0, %tbr; \
+ ba (H); \
+ mov %g0, %wim;
+
+#define TRAP(H) \
+ mov %psr, %l0; \
+ ba (H); \
+ nop; nop;
+
+#define TRAPI(ilevel) \
+ mov ilevel, %l7; \
+ mov %psr, %l0; \
+ b _irq_entry; \
+ mov %wim, %l3
+
+/* Unexcpected trap will halt the processor by forcing it to error state */
#undef BAD_TRAP
#define BAD_TRAP ta 0; nop; nop; nop;
#error Must define number of SPARC register windows, default is 8
#endif
+/* Macros to load address into a register. Uses GOT table for PIC */
+#ifdef __PIC__
+
+#define SPARC_PIC_THUNK_CALL(reg) \
+ sethi %pc22(_GLOBAL_OFFSET_TABLE_-4), %##reg; \
+ call __sparc_get_pc_thunk.reg; \
+ add %##reg, %pc10(_GLOBAL_OFFSET_TABLE_+4), %##reg;
+
+#define SPARC_LOAD_ADDRESS(sym, got, reg) \
+ sethi %gdop_hix22(sym), %##reg; \
+ xor %##reg, %gdop_lox10(sym), %##reg; \
+ ld [%##got + %##reg], %##reg, %gdop(sym);
+
+#else
+
+#define SPARC_PIC_THUNK_CALL(reg)
+#define SPARC_LOAD_ADDRESS(sym, got, tmp) \
+ set sym, %##reg;
+
+#endif
+
#define STACK_ALIGN 8
#define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1))
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! f4-f7
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! f8-fb
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! fc-ff
-/*
- * Version string
- */
-
- .data
- .extern leon3_snooping_avail
- .globl version_string
-version_string:
- .ascii U_BOOT_VERSION_STRING, "\0"
.section ".text"
+ .extern _nomem_amba_init, _nomem_memory_ctrl_init
.align 4
_hardreset:
bge clear_window
save
-wininit:
+wiminit:
set WIM_INIT, %g3
mov %g3, %wim
andn %fp, 0x0f, %fp
sub %fp, 64, %sp
+/* Obtain the address of _GLOBAL_OFFSET_TABLE_ */
+ SPARC_PIC_THUNK_CALL(l7)
+
+/* Scan AMBA Bus for AMBA buses using PnP information. All found
+ * AMBA buses I/O area will be located in i0-i5 upon return.
+ * The i0-i5 registers are later used by _nomem_amba_init2
+ */
+ambainit:
+ call _nomem_amba_init
+ sethi %hi(CONFIG_AMBAPP_IOAREA), %o0
+
+/* Scan AMBA Buses for memory controllers, then initialize the
+ * memory controllers. Note that before setting up the memory controller
+ * the stack can not be used.
+ */
+memory_ctrl_init:
+ SPARC_LOAD_ADDRESS(grlib_mctrl_handlers, l7, o0)
+
+ call _nomem_memory_ctrl_init
+ nop
+
+/* The return valu indicate how many memory controllers where found and
+ * initialized, if no memory controller was initialized, we can not continue
+ * because from here on we expect memory to be working.
+ */
+ cmp %o0, 0
+memory_ctrl_init_failed:
+ beq memory_ctrl_init_failed
+ nop
+
+/*** From now on the stack can be used. ***/
+
cpu_init_unreloc:
call cpu_init_f
- nop
+ nop
/* un relocated start address of monitor */
#define TEXT_START _text
#define DATA_END __init_end
reloc:
- set TEXT_START,%g2
- set DATA_END,%g3
+ SPARC_LOAD_ADDRESS(TEXT_START, l7, g2)
+ SPARC_LOAD_ADDRESS(DATA_END, l7, g3)
set CONFIG_SYS_RELOC_MONITOR_BASE,%g4
reloc_loop:
ldd [%g2],%l0
inc 16,%g2
subcc %g3,%g2,%g0
bne reloc_loop
- inc 16,%g4
+ inc 16,%g4
clr %l0
clr %l1
clr_bss:
/* clear bss area (the relocated) */
- set __bss_start,%g2
- set __bss_end,%g3
+ SPARC_LOAD_ADDRESS(__bss_start, l7, g2)
+ SPARC_LOAD_ADDRESS(__bss_end, l7, g3)
sub %g3,%g2,%g3
add %g3,%g4,%g3
clr %g1 /* std %g0 uses g0 and g1 */
inc 16,%g4
cmp %g3,%g4
bne clr_bss_16
- nop
+ nop
/* add offsets to GOT table */
fixup_got:
- set __got_start,%g4
- set __got_end,%g3
+ SPARC_LOAD_ADDRESS(__got_start, l7, g4)
+ SPARC_LOAD_ADDRESS(__got_end, l7, g3)
/*
* new got offset = (old GOT-PTR (read with ld) -
* CONFIG_SYS_RELOC_MONITOR_BASE(from define) ) +
* Destination Address (from define)
*/
set CONFIG_SYS_RELOC_MONITOR_BASE,%g2
- set TEXT_START, %g1
+ SPARC_LOAD_ADDRESS(TEXT_START, l7, g1)
add %g4,%g2,%g4
sub %g4,%g1,%g4
add %g3,%g2,%g3
inc 4,%g4
cmp %g3,%g4
bne got_loop
- nop
+ nop
prom_relocate:
- set __prom_start, %g2
- set __prom_end, %g3
+ SPARC_LOAD_ADDRESS(__prom_start, l7, g2)
+ SPARC_LOAD_ADDRESS(__prom_end, l7, g3)
set CONFIG_SYS_PROM_OFFSET, %g4
prom_relocate_loop:
inc 16,%g2
subcc %g3,%g2,%g0
bne prom_relocate_loop
- inc 16,%g4
+ inc 16,%g4
/* Trap table has been moved, lets tell CPU about
* the new trap table address
nop
nop
-/* If CACHE snooping is available in hardware the
- * variable leon3_snooping_avail will be set to
- * 0x800000 else 0.
- */
-snoop_detect:
- sethi %hi(0x00800000), %o0
- lda [%g0] 2, %o1
- and %o0, %o1, %o0
- sethi %hi(leon3_snooping_avail+CONFIG_SYS_RELOC_MONITOR_BASE-CONFIG_SYS_TEXT_BASE), %o1
- st %o0, [%lo(leon3_snooping_avail+CONFIG_SYS_RELOC_MONITOR_BASE-CONFIG_SYS_TEXT_BASE)+%o1]
-
-/* call relocate*/
- nop
/* Call relocated init functions */
jump:
- set cpu_init_f2,%o1
+ SPARC_LOAD_ADDRESS(cpu_init_f2, l7, o1)
set CONFIG_SYS_RELOC_MONITOR_BASE,%o2
add %o1,%o2,%o1
sub %o1,%g1,%o1
call %o1
- clr %o0
+ clr %o0
- set board_init_f,%o1
+ SPARC_LOAD_ADDRESS(board_init_f, l7, o1)
set CONFIG_SYS_RELOC_MONITOR_BASE,%o2
+ SPARC_LOAD_ADDRESS(TEXT_START, l7, g1)
add %o1,%o2,%o1
sub %o1,%g1,%o1
call %o1
- clr %o0
+ clr %o0
dead: ta 0 ! if call returns...
nop
projects / oweals / u-boot.git / blobdiff