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@@ -30,6 +30,7 @@
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* Base codes by scsuh (sc.suh)
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* Base codes by scsuh (sc.suh)
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*/
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*/
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+#include <asm-offsets.h>
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#include <config.h>
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#include <config.h>
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#include <version.h>
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#include <version.h>
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#ifdef CONFIG_ENABLE_MMU
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#ifdef CONFIG_ENABLE_MMU
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@@ -107,52 +108,53 @@ _TEXT_BASE:
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_TEXT_PHY_BASE:
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_TEXT_PHY_BASE:
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.word CONFIG_SYS_PHY_UBOOT_BASE
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.word CONFIG_SYS_PHY_UBOOT_BASE
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-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
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-.globl _armboot_start
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-_armboot_start:
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- .word _start
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-#endif
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-
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/*
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/*
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* These are defined in the board-specific linker script.
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* These are defined in the board-specific linker script.
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+ * Subtracting _start from them lets the linker put their
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+ * relative position in the executable instead of leaving
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+ * them null.
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*/
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*/
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-.globl _bss_start
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-_bss_start:
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- .word __bss_start
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-.globl _bss_end
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-_bss_end:
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- .word _end
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+.globl _bss_start_ofs
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+_bss_start_ofs:
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+ .word __bss_start - _start
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-#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
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-/* IRQ stack memory (calculated at run-time) + 8 bytes */
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-.globl IRQ_STACK_START_IN
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-IRQ_STACK_START_IN:
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- .word 0x0badc0de
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+.globl _bss_end_ofs
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+_bss_end_ofs:
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+ .word _end - _start
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-.globl _datarel_start
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-_datarel_start:
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- .word __datarel_start
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+.globl _datarel_start_ofs
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+_datarel_start_ofs:
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+ .word __datarel_start - _start
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-.globl _datarelrolocal_start
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-_datarelrolocal_start:
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- .word __datarelrolocal_start
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+.globl _datarelrolocal_start_ofs
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+_datarelrolocal_start_ofs:
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+ .word __datarelrolocal_start - _start
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-.globl _datarellocal_start
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-_datarellocal_start:
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- .word __datarellocal_start
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+.globl _datarellocal_start_ofs
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+_datarellocal_start_ofs:
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+ .word __datarellocal_start - _start
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-.globl _datarelro_start
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-_datarelro_start:
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- .word __datarelro_start
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+.globl _datarelro_start_ofs
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+_datarelro_start_ofs:
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+ .word __datarelro_start - _start
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-.globl _got_start
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-_got_start:
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- .word __got_start
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+.globl _rel_dyn_start_ofs
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+_rel_dyn_start_ofs:
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+ .word __rel_dyn_start - _start
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-.globl _got_end
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-_got_end:
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- .word __got_end
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+.globl _rel_dyn_end_ofs
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+_rel_dyn_end_ofs:
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+ .word __rel_dyn_end - _start
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+
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+.globl _dynsym_start_ofs
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+_dynsym_start_ofs:
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+ .word __dynsym_start - _start
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+
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+/* IRQ stack memory (calculated at run-time) + 8 bytes */
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+.globl IRQ_STACK_START_IN
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+IRQ_STACK_START_IN:
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+ .word 0x0badc0de
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/*
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/*
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* the actual reset code
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* the actual reset code
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@@ -274,13 +276,11 @@ stack_setup:
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adr r0, _start
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adr r0, _start
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ldr r2, _TEXT_BASE
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ldr r2, _TEXT_BASE
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- ldr r3, _bss_start
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- sub r2, r3, r2 /* r2 <- size of armboot */
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- add r2, r0, r2 /* r2 <- source end address */
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+ ldr r3, _bss_start_ofs
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+ add r2, r0, r3 /* r2 <- source end address */
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cmp r0, r6
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cmp r0, r6
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beq clear_bss
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beq clear_bss
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-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
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copy_loop:
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copy_loop:
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ldmia r0!, {r9-r10} /* copy from source address [r0] */
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ldmia r0!, {r9-r10} /* copy from source address [r0] */
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stmia r6!, {r9-r10} /* copy to target address [r1] */
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stmia r6!, {r9-r10} /* copy to target address [r1] */
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@@ -288,26 +288,45 @@ copy_loop:
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blo copy_loop
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blo copy_loop
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#ifndef CONFIG_PRELOADER
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#ifndef CONFIG_PRELOADER
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- /* fix got entries */
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- ldr r1, _TEXT_BASE /* Text base */
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- mov r0, r7 /* reloc addr */
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- ldr r2, _got_start /* addr in Flash */
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- ldr r3, _got_end /* addr in Flash */
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- sub r3, r3, r1
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- add r3, r3, r0
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- sub r2, r2, r1
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- add r2, r2, r0
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-
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+ /*
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+ * fix .rel.dyn relocations
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+ */
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+ ldr r0, _TEXT_BASE /* r0 <- Text base */
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+ sub r9, r7, r0 /* r9 <- relocation offset */
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+ ldr r10, _dynsym_start_ofs /* r10 <- sym table ofs */
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+ add r10, r10, r0 /* r10 <- sym table in FLASH */
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+ ldr r2, _rel_dyn_start_ofs /* r2 <- rel dyn start ofs */
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+ add r2, r2, r0 /* r2 <- rel dyn start in FLASH */
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+ ldr r3, _rel_dyn_end_ofs /* r3 <- rel dyn end ofs */
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+ add r3, r3, r0 /* r3 <- rel dyn end in FLASH */
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fixloop:
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fixloop:
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- ldr r4, [r2]
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- sub r4, r4, r1
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- add r4, r4, r0
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- str r4, [r2]
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- add r2, r2, #4
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+ ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */
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+ add r0, r0, r9 /* r0 <- location to fix up in RAM */
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+ ldr r1, [r2, #4]
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+ and r8, r1, #0xff
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+ cmp r8, #23 /* relative fixup? */
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+ beq fixrel
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+ cmp r8, #2 /* absolute fixup? */
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+ beq fixabs
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+ /* ignore unknown type of fixup */
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+ b fixnext
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+fixabs:
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+ /* absolute fix: set location to (offset) symbol value */
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+ mov r1, r1, LSR #4 /* r1 <- symbol index in .dynsym */
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+ add r1, r10, r1 /* r1 <- address of symbol in table */
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+ ldr r1, [r1, #4] /* r1 <- symbol value */
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+ add r1, r1, r9 /* r1 <- relocated sym addr */
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+ b fixnext
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+fixrel:
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+ /* relative fix: increase location by offset */
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+ ldr r1, [r0]
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+ add r1, r1, r9
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+fixnext:
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+ str r1, [r0]
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+ add r2, r2, #8 /* each rel.dyn entry is 8 bytes */
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cmp r2, r3
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cmp r2, r3
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- bne fixloop
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+ blo fixloop
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#endif
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#endif
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-#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */
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#ifdef CONFIG_ENABLE_MMU
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#ifdef CONFIG_ENABLE_MMU
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enable_mmu:
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enable_mmu:
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@@ -349,13 +368,11 @@ skip_hw_init:
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clear_bss:
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clear_bss:
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#ifndef CONFIG_PRELOADER
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#ifndef CONFIG_PRELOADER
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- ldr r0, _bss_start
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- ldr r1, _bss_end
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+ ldr r0, _bss_start_ofs
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+ ldr r1, _bss_end_ofs
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ldr r3, _TEXT_BASE /* Text base */
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ldr r3, _TEXT_BASE /* Text base */
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mov r4, r7 /* reloc addr */
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mov r4, r7 /* reloc addr */
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- sub r0, r0, r3
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add r0, r0, r4
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add r0, r0, r4
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- sub r1, r1, r3
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add r1, r1, r4
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add r1, r1, r4
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mov r2, #0x00000000 /* clear */
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mov r2, #0x00000000 /* clear */
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@@ -377,202 +394,20 @@ clbss_l:str r2, [r0] /* clear loop... */
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_nand_boot: .word nand_boot
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_nand_boot: .word nand_boot
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#else
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#else
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- ldr r0, _TEXT_BASE
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- ldr r2, _board_init_r
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- sub r2, r2, r0
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- add r2, r2, r7 /* position from board_init_r in RAM */
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+ ldr r0, _board_init_r_ofs
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+ adr r1, _start
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+ add lr, r0, r1
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+ add lr, lr, r9
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/* setup parameters for board_init_r */
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/* setup parameters for board_init_r */
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mov r0, r5 /* gd_t */
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mov r0, r5 /* gd_t */
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mov r1, r7 /* dest_addr */
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mov r1, r7 /* dest_addr */
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/* jump to it ... */
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/* jump to it ... */
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- mov lr, r2
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mov pc, lr
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mov pc, lr
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-_board_init_r: .word board_init_r
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-#endif
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-
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-#else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
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-
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-/*
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- * the actual reset code
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- */
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-
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-reset:
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- /*
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- * set the cpu to SVC32 mode
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- */
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- mrs r0, cpsr
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- bic r0, r0, #0x3f
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- orr r0, r0, #0xd3
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- msr cpsr, r0
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-
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-/*
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- *************************************************************************
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- *
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- * CPU_init_critical registers
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- *
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- * setup important registers
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- * setup memory timing
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- *
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- *************************************************************************
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- */
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- /*
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- * we do sys-critical inits only at reboot,
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- * not when booting from ram!
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- */
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-cpu_init_crit:
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- /*
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- * When booting from NAND - it has definitely been a reset, so, no need
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- * to flush caches and disable the MMU
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- */
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-#ifndef CONFIG_NAND_SPL
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- /*
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- * flush v4 I/D caches
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- */
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- mov r0, #0
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- mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
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- mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
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-
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- /*
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- * disable MMU stuff and caches
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- */
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- mrc p15, 0, r0, c1, c0, 0
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- bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
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- bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM)
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- orr r0, r0, #0x00000002 @ set bit 2 (A) Align
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- orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache
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-
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- /* Prepare to disable the MMU */
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- adr r2, mmu_disable_phys
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- sub r2, r2, #(CONFIG_SYS_PHY_UBOOT_BASE - CONFIG_SYS_TEXT_BASE)
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- b mmu_disable
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-
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- .align 5
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- /* Run in a single cache-line */
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-mmu_disable:
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- mcr p15, 0, r0, c1, c0, 0
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- nop
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- nop
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- mov pc, r2
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-mmu_disable_phys:
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-
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-#ifdef CONFIG_DISABLE_TCM
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- /*
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- * Disable the TCMs
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- */
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- mrc p15, 0, r0, c0, c0, 2 /* Return TCM details */
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- cmp r0, #0
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- beq skip_tcmdisable
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- mov r1, #0
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- mov r2, #1
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- tst r0, r2
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- mcrne p15, 0, r1, c9, c1, 1 /* Disable Instruction TCM if present*/
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- tst r0, r2, LSL #16
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- mcrne p15, 0, r1, c9, c1, 0 /* Disable Data TCM if present*/
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-skip_tcmdisable:
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-#endif
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-#endif
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-
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-#ifdef CONFIG_PERIPORT_REMAP
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- /* Peri port setup */
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- ldr r0, =CONFIG_PERIPORT_BASE
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- orr r0, r0, #CONFIG_PERIPORT_SIZE
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- mcr p15,0,r0,c15,c2,4
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-#endif
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-
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- /*
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- * Go setup Memory and board specific bits prior to relocation.
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- */
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- bl lowlevel_init /* go setup pll,mux,memory */
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-
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-#ifndef CONFIG_SKIP_RELOCATE_UBOOT
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-relocate: /* relocate U-Boot to RAM */
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- adr r0, _start /* r0 <- current position of code */
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- ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
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- cmp r0, r1 /* don't reloc during debug */
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- beq stack_setup
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-
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- ldr r2, _armboot_start
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- ldr r3, _bss_start
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- sub r2, r3, r2 /* r2 <- size of armboot */
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- add r2, r0, r2 /* r2 <- source end address */
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-
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-copy_loop:
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- ldmia r0!, {r3-r10} /* copy from source address [r0] */
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- stmia r1!, {r3-r10} /* copy to target address [r1] */
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- cmp r0, r2 /* until source end address [r2] */
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- blo copy_loop
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-#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
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-
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-#ifdef CONFIG_ENABLE_MMU
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-enable_mmu:
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- /* enable domain access */
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- ldr r5, =0x0000ffff
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- mcr p15, 0, r5, c3, c0, 0 /* load domain access register */
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-
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- /* Set the TTB register */
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- ldr r0, _mmu_table_base
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- ldr r1, =CONFIG_SYS_PHY_UBOOT_BASE
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- ldr r2, =0xfff00000
|
|
|
|
- bic r0, r0, r2
|
|
|
|
- orr r1, r0, r1
|
|
|
|
- mcr p15, 0, r1, c2, c0, 0
|
|
|
|
-
|
|
|
|
- /* Enable the MMU */
|
|
|
|
- mrc p15, 0, r0, c1, c0, 0
|
|
|
|
- orr r0, r0, #1 /* Set CR_M to enable MMU */
|
|
|
|
-
|
|
|
|
- /* Prepare to enable the MMU */
|
|
|
|
- adr r1, skip_hw_init
|
|
|
|
- and r1, r1, #0x3fc
|
|
|
|
- ldr r2, _TEXT_BASE
|
|
|
|
- ldr r3, =0xfff00000
|
|
|
|
- and r2, r2, r3
|
|
|
|
- orr r2, r2, r1
|
|
|
|
- b mmu_enable
|
|
|
|
-
|
|
|
|
- .align 5
|
|
|
|
- /* Run in a single cache-line */
|
|
|
|
-mmu_enable:
|
|
|
|
-
|
|
|
|
- mcr p15, 0, r0, c1, c0, 0
|
|
|
|
- nop
|
|
|
|
- nop
|
|
|
|
- mov pc, r2
|
|
|
|
-skip_hw_init:
|
|
|
|
|
|
+_board_init_r_ofs:
|
|
|
|
+ .word board_init_r - _start
|
|
#endif
|
|
#endif
|
|
|
|
|
|
- /* Set up the stack */
|
|
|
|
-stack_setup:
|
|
|
|
- ldr r0, =CONFIG_SYS_UBOOT_BASE /* base of copy in DRAM */
|
|
|
|
- sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
|
|
|
|
- sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
|
|
|
|
- sub sp, r0, #12 /* leave 3 words for abort-stack */
|
|
|
|
- bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
|
|
|
|
-
|
|
|
|
-clear_bss:
|
|
|
|
- ldr r0, _bss_start /* find start of bss segment */
|
|
|
|
- ldr r1, _bss_end /* stop here */
|
|
|
|
- mov r2, #0 /* clear */
|
|
|
|
-
|
|
|
|
-clbss_l:
|
|
|
|
- str r2, [r0] /* clear loop... */
|
|
|
|
- add r0, r0, #4
|
|
|
|
- cmp r0, r1
|
|
|
|
- blo clbss_l
|
|
|
|
-
|
|
|
|
-#ifndef CONFIG_NAND_SPL
|
|
|
|
- ldr pc, _start_armboot
|
|
|
|
-
|
|
|
|
-_start_armboot:
|
|
|
|
- .word start_armboot
|
|
|
|
-#else
|
|
|
|
- b nand_boot
|
|
|
|
-/* .word nand_boot*/
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */
|
|
|
|
-
|
|
|
|
#ifdef CONFIG_ENABLE_MMU
|
|
#ifdef CONFIG_ENABLE_MMU
|
|
_mmu_table_base:
|
|
_mmu_table_base:
|
|
.word mmu_table
|
|
.word mmu_table
|
|
@@ -659,14 +494,7 @@ phy_last_jump:
|
|
/* Save user registers (now in svc mode) r0-r12 */
|
|
/* Save user registers (now in svc mode) r0-r12 */
|
|
stmia sp, {r0 - r12}
|
|
stmia sp, {r0 - r12}
|
|
|
|
|
|
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
|
|
|
|
- ldr r2, _armboot_start
|
|
|
|
- sub r2, r2, #(CONFIG_SYS_MALLOC_LEN)
|
|
|
|
- /* set base 2 words into abort stack */
|
|
|
|
- sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE+8)
|
|
|
|
-#else
|
|
|
|
ldr r2, IRQ_STACK_START_IN
|
|
ldr r2, IRQ_STACK_START_IN
|
|
-#endif
|
|
|
|
/* get values for "aborted" pc and cpsr (into parm regs) */
|
|
/* get values for "aborted" pc and cpsr (into parm regs) */
|
|
ldmia r2, {r2 - r3}
|
|
ldmia r2, {r2 - r3}
|
|
/* grab pointer to old stack */
|
|
/* grab pointer to old stack */
|
|
@@ -681,16 +509,7 @@ phy_last_jump:
|
|
.endm
|
|
.endm
|
|
|
|
|
|
.macro get_bad_stack
|
|
.macro get_bad_stack
|
|
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
|
|
|
|
- /* setup our mode stack (enter in banked mode) */
|
|
|
|
- ldr r13, _armboot_start
|
|
|
|
- /* move past malloc pool */
|
|
|
|
- sub r13, r13, #(CONFIG_SYS_MALLOC_LEN)
|
|
|
|
- /* move to reserved a couple spots for abort stack */
|
|
|
|
- sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE + 8)
|
|
|
|
-#else
|
|
|
|
ldr r13, IRQ_STACK_START_IN @ setup our mode stack
|
|
ldr r13, IRQ_STACK_START_IN @ setup our mode stack
|
|
-#endif
|
|
|
|
|
|
|
|
/* save caller lr in position 0 of saved stack */
|
|
/* save caller lr in position 0 of saved stack */
|
|
str lr, [r13]
|
|
str lr, [r13]
|
|
@@ -715,16 +534,7 @@ phy_last_jump:
|
|
sub r13, r13, #4
|
|
sub r13, r13, #4
|
|
/* save R0's value. */
|
|
/* save R0's value. */
|
|
str r0, [r13]
|
|
str r0, [r13]
|
|
-#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
|
|
|
|
- /* get data regions start */
|
|
|
|
- ldr r0, _armboot_start
|
|
|
|
- /* move past malloc pool */
|
|
|
|
- sub r0, r0, #(CONFIG_SYS_MALLOC_LEN)
|
|
|
|
- /* move past gbl and a couple spots for abort stack */
|
|
|
|
- sub r0, r0, #(CONFIG_SYS_GBL_DATA_SIZE + 8)
|
|
|
|
-#else
|
|
|
|
ldr r13, IRQ_STACK_START_IN @ setup our mode stack
|
|
ldr r13, IRQ_STACK_START_IN @ setup our mode stack
|
|
-#endif
|
|
|
|
/* save caller lr in position 0 of saved stack */
|
|
/* save caller lr in position 0 of saved stack */
|
|
str lr, [r0]
|
|
str lr, [r0]
|
|
/* get the spsr */
|
|
/* get the spsr */
|