diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/gen83xx/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/gen83xx/start/start.S | 86 |
1 files changed, 43 insertions, 43 deletions
diff --git a/c/src/lib/libbsp/powerpc/gen83xx/start/start.S b/c/src/lib/libbsp/powerpc/gen83xx/start/start.S index 8dec6a1822..ace422bb44 100644 --- a/c/src/lib/libbsp/powerpc/gen83xx/start/start.S +++ b/c/src/lib/libbsp/powerpc/gen83xx/start/start.S @@ -16,10 +16,10 @@ +-----------------------------------------------------------------+ | this file contains the startup assembly code | \*===============================================================*/ -/* $Id$ */ +/* $Id$ */ -#include <libcpu/powerpc-utility.h> +#include <libcpu/powerpc-utility.h> #include <rtems/powerpc/cache.h> #include <bsp.h> #include <mpc83xx/mpc83xx.h> @@ -27,7 +27,7 @@ .macro SET_IMM_REGW base, reg2, offset, value LA \reg2, \value stw \reg2,\offset(\base) -.endm +.endm #define REP8(l) l ; l; l; l; l; l; l; l; @@ -37,7 +37,7 @@ #if defined(RESET_CONF_WRD_L) .section ".resconf","ax" PUBLIC_VAR (reset_conf_words) -reset_conf_words: +reset_conf_words: REP8( .byte ((RESET_CONF_WRD_L >> 24) & 0xff)) REP8( .byte ((RESET_CONF_WRD_L >> 16) & 0xff)) REP8( .byte ((RESET_CONF_WRD_L >> 8) & 0xff)) @@ -51,10 +51,10 @@ reset_conf_words: .section ".vectors","ax" PUBLIC_VAR (reset_vec) -reset_vec: +reset_vec: bl rom_entry - -.section ".entry" + +.section ".entry" PUBLIC_VAR (start) start: @@ -84,7 +84,7 @@ copy_uboot_board_info: #endif /* HAS_UBOOT */ /* - * basic CPU setup: + * basic CPU setup: * init MSR */ mfmsr r30 @@ -93,18 +93,18 @@ copy_uboot_board_info: mtmsr r30 /* Set RI/ME, Clr EE in MSR */ b start_rom_skip - + PUBLIC_VAR (rom_entry) rom_entry: /* - * basic CPU setup: + * basic CPU setup: * init MSR */ mfmsr r30 SETBITS r30, r29, MSR_ME|MSR_RI CLRBITS r30, r29, MSR_IP|MSR_EE mtmsr r30 /* Set RI/ME, Clr EE in MSR */ - + /* * ROM startup: remap IMMR to 0xE0000000 * use special sequence from MPC8349EA RM Rev 1, 5.2.4.1.1 "Updating IMMRBAR" @@ -147,14 +147,14 @@ rom_entry: mtlr r29 blr /* now further execution in upper ROM */ -start_code_in_rom: +start_code_in_rom: #ifdef LBLAWBAR0_VAL SET_IMM_REGW r31,r30,LBLAWBAR0_OFF,LBLAWBAR0_VAL #endif #ifdef LBLAWAR0_VAL SET_IMM_REGW r31,r30,LBLAWAR0_OFF,LBLAWAR0_VAL -#endif +#endif #ifdef LBLAWBAR1_VAL SET_IMM_REGW r31,r30,LBLAWBAR1_OFF,LBLAWBAR1_VAL #endif @@ -232,7 +232,7 @@ start_code_in_rom: */ #ifdef MRPTR_VAL SET_IMM_REGW r31,r30,MRPTR_OFF,MRPTR_VAL -#endif +#endif /* * ROM startup: init SDRAM */ @@ -357,7 +357,7 @@ start_rom_skip: start_rom_skip1: mflr r20 LA r30,start_rom_skip1 - sub. r20,r20,r30 + sub. r20,r20,r30 /* * execution address offset == 0? * then do not relocate code and data @@ -367,24 +367,24 @@ start_rom_skip1: * ROM or relocatable startup: copy startup code to SDRAM */ /* get start address of text section in RAM */ - LA r29, bsp_section_text_start + LA r29, bsp_section_text_start /* get start address of text section in ROM (add reloc offset) */ - add r30, r20, r29 + add r30, r20, r29 /* get size of startup code */ LA r28, end_reloc_startup LA r31, bsp_section_text_start sub 28,r28,r31 /* copy startup code from ROM to RAM location */ - bl copy_image - + bl copy_image + /* * ROM startup: jump to code copy in SDRAM */ /* get compile time address of label */ - LA r29, copy_rest_of_text + LA r29, copy_rest_of_text mtlr r29 blr /* now further execution RAM */ -copy_rest_of_text: +copy_rest_of_text: #ifdef LCRR_VAL SET_IMM_REGW r31,r30,LCRR_OFF,LCRR_VAL #endif @@ -394,27 +394,27 @@ copy_rest_of_text: /* get start address of rest of code in RAM */ LA r29, end_reloc_startup /* get start address of text section in ROM (add reloc offset) */ - add r30, r20, r29 + add r30, r20, r29 /* get size of rest of code */ LA r28, bsp_section_text_start LA r31, bsp_section_text_size add r28,r28,r31 sub r28,r28,r29 bl copy_image /* copy text section from ROM to RAM location */ - + /* * ROM or relocatable startup: copy data to SDRAM */ /* get start address of data section in RAM */ - LA r29, bsp_section_data_start + LA r29, bsp_section_data_start /* get start address of data section in ROM (add reloc offset) */ - add r30, r20, r29 + add r30, r20, r29 /* get size of RAM image */ - LA r28, bsp_section_data_size + LA r28, bsp_section_data_size /* copy initialized data section from ROM to RAM location */ - bl copy_image + bl copy_image -start_code_in_ram: +start_code_in_ram: /* * ROM/RAM startup: clear bss in SDRAM @@ -427,8 +427,8 @@ start_code_in_ram: */ /* Set stack pointer (common for RAM/ROM startup) */ - LA r1, bsp_section_text_start - addi r1, r1, -0x10 /* Set up stack pointer = beginning of text section - 0x10 */ + LA r1, bsp_section_text_start + addi r1, r1, -0x10 /* Set up stack pointer = beginning of text section - 0x10 */ /* Create NULL */ li r0, 0 @@ -451,12 +451,12 @@ start_code_in_ram: xor r3, r3, r3 bl SYM (boot_card) /* Call the first C routine */ - + twiddle: /* We don't expect to return from boot_card but if we do */ /* wait here for watchdog to kick us into hard reset */ - b twiddle - + b twiddle + copy_image: mr r27, r28 srwi r28, r28, 2 @@ -466,13 +466,13 @@ copy_image: sub r27, r27, r28 /* maybe some residual bytes */ copy_image_word: lswi r28, r30, 0x04 - + stswi r28, r29, 0x04 /* do word copy ROM -> RAM */ - + addi r30, r30, 0x04 /* increment source pointer */ addi r29, r29, 0x04 /* increment destination pointer */ - + bdnz copy_image_word /* decrement ctr and branch if not 0 */ cmpwi r27, 0x00 /* copy image finished ? */ @@ -480,19 +480,19 @@ copy_image_word: mtctr r27 /* reload counter for residual bytes */ copy_image_byte: lswi r28, r30, 0x01 - + stswi r28, r29, 0x01 /* do byte copy ROM -> RAM */ - - + + addi r30, r30, 0x01 /* increment source pointer */ addi r29, r29, 0x01 /* increment destination pointer */ - + bdnz copy_image_byte /* decrement ctr and branch if not 0 */ - + copy_image_end: blr - + /** * @fn int mpc83xx_zero_4( void *dest, size_t n) * @@ -542,7 +542,7 @@ mpc83xx_zero_4_tail: stwx r0, r3, r8 addi r8, r8, 16 bdnz mpc83xx_zero_4_tail - + /* Return */ blr |