Signed-off-by: Heiko Schocher hs@denx.de --- arch/arm/cpu/armv7/omap3/sdrc.c | 14 +++- arch/arm/cpu/armv7/start.S | 174 +++++++++++++++++++++++++++----------- arch/arm/cpu/armv7/u-boot.lds | 14 +++- board/ti/beagle/config.mk | 2 +- include/configs/omap3_beagle.h | 4 + 5 files changed, 153 insertions(+), 55 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap3/sdrc.c b/arch/arm/cpu/armv7/omap3/sdrc.c index 96fd990..bfe4e1f 100644 --- a/arch/arm/cpu/armv7/omap3/sdrc.c +++ b/arch/arm/cpu/armv7/omap3/sdrc.c @@ -181,13 +181,23 @@ int dram_init(void)
size1 = get_sdr_cs_size(CS1); } + gd->ram_size = size0 + size1; + + return 0; +} + +void dram_init_banksize (void) +{ + DECLARE_GLOBAL_DATA_PTR; + unsigned int size0 = 0, size1 = 0; + + size0 = get_sdr_cs_size(CS0); + size1 = get_sdr_cs_size(CS1);
gd->bd->bi_dram[0].start = PHYS_SDRAM_1; gd->bd->bi_dram[0].size = size0; gd->bd->bi_dram[1].start = PHYS_SDRAM_1 + get_sdr_cs_offset(CS1); gd->bd->bi_dram[1].size = size1; - - return 0; }
/* diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 1e0a150..20c999f 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -65,13 +65,10 @@ _end_vect: * *************************************************************************/
+.globl _TEXT_BASE _TEXT_BASE: .word TEXT_BASE
-.globl _armboot_start -_armboot_start: - .word _start - /* * These are defined in the board-specific linker script. */ @@ -95,6 +92,35 @@ FIQ_STACK_START: .word 0x0badc0de #endif
+/* IRQ stack memory (calculated at run-time) + 8 bytes */ +.globl IRQ_STACK_START_IN +IRQ_STACK_START_IN: + .word 0x0badc0de + +.globl _datarel_start +_datarel_start: + .word __datarel_start + +.globl _datarelrolocal_start +_datarelrolocal_start: + .word __datarelrolocal_start + +.globl _datarellocal_start +_datarellocal_start: + .word __datarellocal_start + +.globl _datarelro_start +_datarelro_start: + .word __datarelro_start + +.globl _got_start +_got_start: + .word __got_start + +.globl _got_end +_got_end: + .word __got_end + /* * the actual reset code */ @@ -136,51 +162,104 @@ next: bl cpu_init_crit #endif
-#ifndef CONFIG_SKIP_RELOCATE_UBOOT -relocate: @ relocate U-Boot to RAM - adr r0, _start @ r0 <- current position of code - ldr r1, _TEXT_BASE @ test if we run from flash or RAM - cmp r0, r1 @ don't reloc during debug - beq stack_setup +/* Set stackpointer in internal RAM to call board_init_f */ +call_board_init_f: + ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) + ldr r0,=0x00000000 + bl board_init_f
- ldr r2, _armboot_start - ldr r3, _bss_start - sub r2, r3, r2 @ r2 <- size of armboot - add r2, r0, r2 @ r2 <- source end address +/*------------------------------------------------------------------------------*/
-copy_loop: @ copy 32 bytes at a time - ldmia r0!, {r3 - r10} @ copy from source address [r0] - stmia r1!, {r3 - r10} @ copy to target address [r1] - cmp r0, r2 @ until source end addreee [r2] - ble copy_loop -#endif /* CONFIG_SKIP_RELOCATE_UBOOT */ - - /* Set up the stack */ +/* + * void relocate_code (addr_sp, gd, addr_moni) + * + * This "function" does not return, instead it continues in RAM + * after relocating the monitor code. + * + */ + .globl relocate_code +relocate_code: + mov r4, r0 /* save addr_sp */ + mov r5, r1 /* save addr of gd */ + mov r6, r2 /* save addr of destination */ + mov r7, r2 /* save addr of destination */ + + /* Set up the stack */ stack_setup: - ldr r0, _TEXT_BASE @ upper 128 KiB: relocated uboot - sub r0, r0, #CONFIG_SYS_MALLOC_LEN @ malloc area - sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE @ bdinfo -#ifdef CONFIG_USE_IRQ - sub r0, r0, #(CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ) + mov sp, r4 + +#ifndef CONFIG_SKIP_RELOCATE_UBOOT + adr r0, _start + ldr r2, _TEXT_BASE + ldr r3, _bss_start + sub r2, r3, r2 /* r2 <- size of armboot */ + add r2, r0, r2 /* r2 <- source end address */ + cmp r0, r6 +#ifndef CONFIG_PRELOADER + beq jump_2_ram #endif - sub sp, r0, #12 @ leave 3 words for abort-stack - bic sp, sp, #7 @ 8-byte alignment for ABI compliance
- /* Clear BSS (if any). Is below tx (watch load addr - need space) */ -clear_bss: - ldr r0, _bss_start @ find start of bss segment - ldr r1, _bss_end @ stop here - mov r2, #0x00000000 @ clear value -clbss_l: - str r2, [r0] @ clear BSS location - cmp r0, r1 @ are we at the end yet - add r0, r0, #4 @ increment clear index pointer - bne clbss_l @ keep clearing till at end +copy_loop: + ldmia r0!, {r9-r10} /* copy from source address [r0] */ + stmia r6!, {r9-r10} /* copy to target address [r1] */ + cmp r0, r2 /* until source end addreee [r2] */ + ble copy_loop
- ldr pc, _start_armboot @ jump to C code +#ifndef CONFIG_PRELOADER + /* fix got entries */ + ldr r1, _TEXT_BASE + mov r0, r7 /* reloc addr */ + ldr r2, _got_start /* addr in Flash */ + ldr r3, _got_end /* addr in Flash */ + sub r3, r3, r1 + add r3, r3, r0 + sub r2, r2, r1 + add r2, r2, r0 + +fixloop: + ldr r4, [r2] + sub r4, r4, r1 + add r4, r4, r0 + str r4, [r2] + add r2, r2, #4 + cmp r2, r3 + bne fixloop
-_start_armboot: .word start_armboot +clear_bss: + ldr r0, _bss_start + ldr r1, _bss_end + ldr r3, _TEXT_BASE /* Text base */ + mov r4, r7 /* reloc addr */ + sub r0, r0, r3 + add r0, r0, r4 + sub r1, r1, r3 + add r1, r1, r4 + mov r2, #0x00000000 /* clear */ + +clbss_l:str r2, [r0] /* clear loop... */ + add r0, r0, #4 + cmp r0, r1 + bne clbss_l +#endif /* #ifndef CONFIG_PRELOADER */ +#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */
+/* + * We are done. Do not return, instead branch to second part of board + * initialization, now running from RAM. + */ +jump_2_ram: + ldr r0, _TEXT_BASE + ldr r2, _board_init_r + sub r2, r2, r0 + add r2, r2, r7 /* position from board_init_r in RAM */ + /* setup parameters for board_init_r */ + mov r0, r5 /* gd_t */ + mov r1, r7 /* dest_addr */ + /* jump to it ... */ + mov lr, r2 + mov pc, lr + +_board_init_r: .word board_init_r
/************************************************************************* * @@ -264,9 +343,7 @@ cpu_init_crit: stmia sp, {r0 - r12} @ Save user registers (now in @ svc mode) r0-r12
- ldr r2, _armboot_start - sub r2, r2, #(CONFIG_SYS_MALLOC_LEN) - sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE + 8) @ set base 2 words into abort + ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort @ stack ldmia r2, {r2 - r3} @ get values for "aborted" pc @ and cpsr (into parm regs) @@ -303,11 +380,8 @@ cpu_init_crit: .endm
.macro get_bad_stack - ldr r13, _armboot_start @ setup our mode stack (enter + ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter @ in banked mode) - sub r13, r13, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool - sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE + 8) @ move to reserved a couple - @ spots for abort stack
str lr, [r13] @ save caller lr in position 0 @ of saved stack @@ -328,9 +402,7 @@ cpu_init_crit: sub r13, r13, #4 @ space on current stack for @ scratch reg. str r0, [r13] @ save R0's value. - ldr r0, _armboot_start @ get data regions start - sub r0, r0, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool - sub r0, r0, #(CONFIG_SYS_GBL_DATA_SIZE + 8) @ move past gbl and a couple + ldr r0, IRQ_STACK_START_IN @ get data regions start @ spots for abort stack str lr, [r0] @ save caller lr in position 0 @ of saved stack diff --git a/arch/arm/cpu/armv7/u-boot.lds b/arch/arm/cpu/armv7/u-boot.lds index 9e5b5a9..d4fd3fc 100644 --- a/arch/arm/cpu/armv7/u-boot.lds +++ b/arch/arm/cpu/armv7/u-boot.lds @@ -42,10 +42,22 @@ SECTIONS .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
. = ALIGN(4); - .data : { *(.data) } + .data : { + *(.data) + __datarel_start = .; + *(.data.rel) + __datarelrolocal_start = .; + *(.data.rel.ro.local) + __datarellocal_start = .; + *(.data.rel.local) + __datarelro_start = .; + *(.data.rel.ro) + }
+ __got_start = .; . = ALIGN(4); .got : { *(.got) } + __got_end = .;
__u_boot_cmd_start = .; .u_boot_cmd : { *(.u_boot_cmd) } diff --git a/board/ti/beagle/config.mk b/board/ti/beagle/config.mk index 879b2e2..6fb10e3 100644 --- a/board/ti/beagle/config.mk +++ b/board/ti/beagle/config.mk @@ -30,4 +30,4 @@ # (mem base + reserved)
# For use with external or internal boots. -TEXT_BASE = 0x80e80000 +TEXT_BASE = 0x80008000 diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h index ae5a791..e10fb89 100644 --- a/include/configs/omap3_beagle.h +++ b/include/configs/omap3_beagle.h @@ -335,4 +335,8 @@ extern unsigned int boot_flash_sec; extern unsigned int boot_flash_type; #endif
+/* additions for new relocation code, must added to all boards */ +#define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM_1 +#define CONFIG_SYS_INIT_SP_ADDR (LOW_LEVEL_SRAM_STACK - CONFIG_SYS_GBL_DATA_SIZE) + #endif /* __CONFIG_H */