diff options
| -rw-r--r-- | board/atmel/atstk1000/flash.c | 2 | ||||
| -rw-r--r-- | board/atmel/atstk1000/u-boot.lds | 21 | ||||
| -rw-r--r-- | cpu/at32ap/entry.S | 3 | ||||
| -rw-r--r-- | cpu/at32ap/exception.c | 7 | ||||
| -rw-r--r-- | cpu/at32ap/interrupts.c | 3 | ||||
| -rw-r--r-- | cpu/at32ap/start.S | 113 | ||||
| -rw-r--r-- | include/asm-avr32/global_data.h | 1 | ||||
| -rw-r--r-- | include/configs/atstk1002.h | 10 | ||||
| -rw-r--r-- | lib_avr32/board.c | 126 |
9 files changed, 218 insertions, 68 deletions
diff --git a/board/atmel/atstk1000/flash.c b/board/atmel/atstk1000/flash.c index 3aebf66..958f4dc 100644 --- a/board/atmel/atstk1000/flash.c +++ b/board/atmel/atstk1000/flash.c @@ -57,7 +57,7 @@ unsigned long flash_init(void) gd->bd->bi_flashstart = CFG_FLASH_BASE; gd->bd->bi_flashsize = CFG_FLASH_SIZE; - gd->bd->bi_flashoffset = __edata_lma - _text; + gd->bd->bi_flashoffset = _edata - _text; flash_info[0].size = CFG_FLASH_SIZE; flash_info[0].sector_count = 135; diff --git a/board/atmel/atstk1000/u-boot.lds b/board/atmel/atstk1000/u-boot.lds index ef89ea4..34e347a 100644 --- a/board/atmel/atstk1000/u-boot.lds +++ b/board/atmel/atstk1000/u-boot.lds @@ -40,35 +40,38 @@ SECTIONS } . = ALIGN(32); __flashprog_end = .; + _etext = .; - . = ALIGN(8); .rodata : { *(.rodata) *(.rodata.*) } - _etext = .; - __data_lma = ALIGN(8); - . = 0x24000000; + . = ALIGN(8); _data = .; - .data : AT(__data_lma) { + .data : { *(.data) *(.data.*) } . = ALIGN(4); __u_boot_cmd_start = .; - __u_boot_cmd_lma = __data_lma + (__u_boot_cmd_start - _data); - .u_boot_cmd : AT(__u_boot_cmd_lma) { + .u_boot_cmd : { KEEP(*(.u_boot_cmd)) } __u_boot_cmd_end = .; + . = ALIGN(4); + _got = .; + .got : { + *(.got) + } + _egot = .; + . = ALIGN(8); _edata = .; - __edata_lma = __u_boot_cmd_lma + (_edata - __u_boot_cmd_start); - .bss : AT(__edata_lma) { + .bss : { *(.bss) *(.bss.*) } diff --git a/cpu/at32ap/entry.S b/cpu/at32ap/entry.S index b52d798..a6fc688 100644 --- a/cpu/at32ap/entry.S +++ b/cpu/at32ap/entry.S @@ -42,8 +42,7 @@ timer_interrupt_handler: * We're running at interrupt level 3, so we don't need to save * r8-r12 or lr to the stack. */ - mov r8, lo(timer_overflow) - orh r8, hi(timer_overflow) + lda.w r8, timer_overflow ld.w r9, r8[0] mov r10, -1 mtsr SYSREG_COMPARE, r10 diff --git a/cpu/at32ap/exception.c b/cpu/at32ap/exception.c index 4123c44..0672685 100644 --- a/cpu/at32ap/exception.c +++ b/cpu/at32ap/exception.c @@ -24,6 +24,8 @@ #include <asm/sysreg.h> #include <asm/ptrace.h> +DECLARE_GLOBAL_DATA_PTR; + static const char * const cpu_modes[8] = { "Application", "Supervisor", "Interrupt level 0", "Interrupt level 1", "Interrupt level 2", "Interrupt level 3", "Exception", "NMI" @@ -109,11 +111,10 @@ void do_unknown_exception(unsigned int ecr, struct pt_regs *regs) printf("CPU Mode: %s\n", cpu_modes[mode]); /* Avoid exception loops */ - if (regs->sp >= CFG_INIT_SP_ADDR - || regs->sp < (CFG_INIT_SP_ADDR - CONFIG_STACKSIZE)) + if (regs->sp < CFG_SDRAM_BASE || regs->sp >= gd->stack_end) printf("\nStack pointer seems bogus, won't do stack dump\n"); else - dump_mem("\nStack: ", regs->sp, CFG_INIT_SP_ADDR); + dump_mem("\nStack: ", regs->sp, gd->stack_end); panic("Unhandled exception\n"); } diff --git a/cpu/at32ap/interrupts.c b/cpu/at32ap/interrupts.c index 85420a4..c9e0499 100644 --- a/cpu/at32ap/interrupts.c +++ b/cpu/at32ap/interrupts.c @@ -115,9 +115,12 @@ void udelay(unsigned long usec) static int set_interrupt_handler(unsigned int nr, void (*handler)(void), unsigned int priority) { + extern void _evba(void); unsigned long intpr; unsigned long handler_addr = (unsigned long)handler; + handler_addr -= (unsigned long)&_evba; + if ((handler_addr & HANDLER_MASK) != handler_addr || (priority & INTLEV_MASK) != priority) return -EINVAL; diff --git a/cpu/at32ap/start.S b/cpu/at32ap/start.S index 4ae0b54..ab8c2b7 100644 --- a/cpu/at32ap/start.S +++ b/cpu/at32ap/start.S @@ -70,32 +70,12 @@ _start: 2: lddpc sp, sp_init - /* - * Relocate the data section and initialize .bss. Everything - * is guaranteed to be at least doubleword aligned by the - * linker script. - */ - lddpc r12, .Ldata_vma - lddpc r11, .Ldata_lma - lddpc r10, .Ldata_end - sub r10, r12 -4: ld.d r8, r11++ - sub r10, 8 - st.d r12++, r8 - brne 4b - - mov r8, 0 - mov r9, 0 - lddpc r10, .Lbss_end - sub r10, r12 -4: sub r10, 8 - st.d r12++, r8 - brne 4b - /* Initialize the GOT pointer */ lddpc r6, got_init 3: rsub r6, pc - ld.w pc, r6[board_init_f@got] + + /* Let's go */ + rjmp board_init_f .align 2 .type sp_init,@object @@ -103,11 +83,82 @@ sp_init: .long CFG_INIT_SP_ADDR got_init: .long 3b - _GLOBAL_OFFSET_TABLE_ -.Ldata_lma: - .long __data_lma -.Ldata_vma: - .long _data -.Ldata_end: - .long _edata -.Lbss_end: - .long _end + + /* + * void relocate_code(new_sp, new_gd, monitor_addr) + * + * Relocate the u-boot image into RAM and continue from there. + * Does not return. + */ + .global relocate_code + .type relocate_code,@function +relocate_code: + mov sp, r12 /* use new stack */ + mov r12, r11 /* save new_gd */ + mov r11, r10 /* save destination address */ + + /* copy .text section and flush the cache along the way */ + lda.w r8, _text + lda.w r9, _etext + sub lr, r10, r8 /* relocation offset */ + +1: ldm r8++, r0-r3 + stm r10, r0-r3 + sub r10, -16 + ldm r8++, r0-r3 + stm r10, r0-r3 + sub r10, -16 + cp.w r8, r9 + cache r10[-4], 0x0d /* dcache clean/invalidate */ + cache r10[-4], 0x01 /* icache invalidate */ + brlt 1b + + /* flush write buffer */ + sync 0 + + /* copy data sections */ + lda.w r9, _edata +1: ld.d r0, r8++ + st.d r10++, r0 + cp.w r8, r9 + brlt 1b + + /* zero out .bss */ + mov r0, 0 + mov r1, 0 + lda.w r9, _end + sub r9, r8 +1: st.d r10++, r0 + sub r9, 8 + brgt 1b + + /* jump to RAM */ + sub r0, pc, . - in_ram + add pc, r0, lr + + .align 2 +in_ram: + /* find the new GOT and relocate it */ + lddpc r6, got_init_reloc +3: rsub r6, pc + mov r8, r6 + lda.w r9, _egot + lda.w r10, _got + sub r9, r10 +1: ld.w r0, r8[0] + add r0, lr + st.w r8++, r0 + sub r9, 4 + brgt 1b + + /* Move the exception handlers */ + mfsr r2, SYSREG_EVBA + add r2, lr + mtsr SYSREG_EVBA, r2 + + /* Do the rest of the initialization sequence */ + call board_init_r + + .align 2 +got_init_reloc: + .long 3b - _GLOBAL_OFFSET_TABLE_ diff --git a/include/asm-avr32/global_data.h b/include/asm-avr32/global_data.h index 3b6769b..7c45b36 100644 --- a/include/asm-avr32/global_data.h +++ b/include/asm-avr32/global_data.h @@ -37,6 +37,7 @@ typedef struct global_data { unsigned long flags; unsigned long baudrate; unsigned long sdram_size; + unsigned long stack_end; /* highest stack address */ unsigned long have_console; /* serial_init() was called */ unsigned long reloc_off; /* Relocation Offset */ unsigned long env_addr; /* Address of env struct */ diff --git a/include/configs/atstk1002.h b/include/configs/atstk1002.h index 717f540..7463633 100644 --- a/include/configs/atstk1002.h +++ b/include/configs/atstk1002.h @@ -151,16 +151,8 @@ #define CFG_INIT_SP_ADDR (CFG_INTRAM_BASE + CFG_INTRAM_SIZE) #define CFG_MALLOC_LEN (256*1024) -#define CFG_MALLOC_END \ - ({ \ - DECLARE_GLOBAL_DATA_PTR; \ - CFG_SDRAM_BASE + gd->sdram_size; \ - }) -#define CFG_MALLOC_START (CFG_MALLOC_END - CFG_MALLOC_LEN) - #define CFG_DMA_ALLOC_LEN (16384) -#define CFG_DMA_ALLOC_END (CFG_MALLOC_START) -#define CFG_DMA_ALLOC_START (CFG_DMA_ALLOC_END - CFG_DMA_ALLOC_LEN) + /* Allow 2MB for the kernel run-time image */ #define CFG_LOAD_ADDR (CFG_SDRAM_BASE + 0x00200000) #define CFG_BOOTPARAMS_LEN (16 * 1024) diff --git a/lib_avr32/board.c b/lib_avr32/board.c index 12d0b97..c55ebd5 100644 --- a/lib_avr32/board.c +++ b/lib_avr32/board.c @@ -47,11 +47,14 @@ static unsigned long mem_malloc_start = 0; static unsigned long mem_malloc_end = 0; static unsigned long mem_malloc_brk = 0; -/* The malloc area is wherever the board wants it to be */ +/* The malloc area is right below the monitor image in RAM */ static void mem_malloc_init(void) { - mem_malloc_start = CFG_MALLOC_START; - mem_malloc_end = CFG_MALLOC_END; + unsigned long monitor_addr; + + monitor_addr = CFG_MONITOR_BASE + gd->reloc_off; + mem_malloc_end = monitor_addr; + mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN; mem_malloc_brk = mem_malloc_start; printf("malloc: Using memory from 0x%08lx to 0x%08lx\n", @@ -125,6 +128,12 @@ static void display_flash_config (void) void board_init_f(ulong unused) { gd_t gd_data; + gd_t *new_gd; + bd_t *bd; + unsigned long *new_sp; + unsigned long monitor_len; + unsigned long monitor_addr; + unsigned long addr; /* Initialize the global data pointer */ memset(&gd_data, 0, sizeof(gd_data)); @@ -133,7 +142,6 @@ void board_init_f(ulong unused) /* Perform initialization sequence */ board_early_init_f(); cpu_init(); - timer_init(); env_init(); init_baudrate(); serial_init(); @@ -141,28 +149,120 @@ void board_init_f(ulong unused) display_banner(); board_init_memories(); - board_init_r(gd, CFG_MONITOR_BASE); + /* If we have no SDRAM, we can't go on */ + if (!gd->sdram_size) + panic("No working SDRAM available\n"); + + /* + * 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): + * - u-boot image + * - heap for malloc() + * - board info struct + * - global data struct + * - stack + */ + addr = CFG_SDRAM_BASE + gd->sdram_size; + monitor_len = _end - _text; + + /* + * Reserve memory for u-boot code, data and bss. + * Round down to next 4 kB limit. + */ + addr -= monitor_len; + addr &= ~(4096UL - 1); + monitor_addr = addr; + + /* Reserve memory for malloc() */ + addr -= CFG_MALLOC_LEN; + + /* Allocate a Board Info struct on a word boundary */ + addr -= sizeof(bd_t); + addr &= ~3UL; + gd->bd = bd = (bd_t *)addr; + + /* Allocate a new global data copy on a 8-byte boundary. */ + addr -= sizeof(gd_t); + addr &= ~7UL; + new_gd = (gd_t *)addr; + + /* And finally, a new, bigger stack. */ + new_sp = (unsigned long *)addr; + gd->stack_end = addr; + *(--new_sp) = 0; + *(--new_sp) = 0; + + /* + * Initialize the board information struct with the + * information we have. + */ + bd->bi_dram[0].start = CFG_SDRAM_BASE; + bd->bi_dram[0].size = gd->sdram_size; + bd->bi_baudrate = gd->baudrate; + + memcpy(new_gd, gd, sizeof(gd_t)); + + relocate_code((unsigned long)new_sp, new_gd, monitor_addr); } void board_init_r(gd_t *new_gd, ulong dest_addr) { + extern void malloc_bin_reloc (void); +#ifndef CFG_ENV_IS_NOWHERE + extern char * env_name_spec; +#endif + cmd_tbl_t *cmdtp; + bd_t *bd; + gd = new_gd; + bd = gd->bd; + + gd->flags |= GD_FLG_RELOC; + gd->reloc_off = dest_addr - CFG_MONITOR_BASE; monitor_flash_len = _edata - _text; - mem_malloc_init(); - gd->bd = malloc(sizeof(bd_t)); - memset(gd->bd, 0, sizeof(bd_t)); - gd->bd->bi_baudrate = gd->baudrate; - gd->bd->bi_dram[0].start = CFG_SDRAM_BASE; - gd->bd->bi_dram[0].size = gd->sdram_size; + /* + * We have to relocate the command table manually + */ + for (cmdtp = &__u_boot_cmd_start; + cmdtp != &__u_boot_cmd_end; cmdtp++) { + unsigned long addr; + + addr = (unsigned long)cmdtp->cmd + gd->reloc_off; + cmdtp->cmd = (typeof(cmdtp->cmd))addr; + + addr = (unsigned long)cmdtp->name + gd->reloc_off; + cmdtp->name = (typeof(cmdtp->name))addr; + + if (cmdtp->usage) { + addr = (unsigned long)cmdtp->usage + gd->reloc_off; + cmdtp->usage = (typeof(cmdtp->usage))addr; + } +#ifdef CFG_LONGHELP + if (cmdtp->help) { + addr = (unsigned long)cmdtp->help + gd->reloc_off; + cmdtp->help = (typeof(cmdtp->help))addr; + } +#endif + } + + /* there are some other pointer constants we must deal with */ +#ifndef CFG_ENV_IS_NOWHERE + env_name_spec += gd->reloc_off; +#endif + timer_init(); + mem_malloc_init(); + malloc_bin_reloc(); board_init_info(); flash_init(); - if (gd->bd->bi_flashsize) + if (bd->bi_flashsize) display_flash_config(); - if (gd->bd->bi_dram[0].size) + if (bd->bi_dram[0].size) display_dram_config(); gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN); |