diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/tqm8xx/startup/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/tqm8xx/startup/start.S | 66 |
1 files changed, 33 insertions, 33 deletions
diff --git a/c/src/lib/libbsp/powerpc/tqm8xx/startup/start.S b/c/src/lib/libbsp/powerpc/tqm8xx/startup/start.S index d94817d597..950730dc5c 100644 --- a/c/src/lib/libbsp/powerpc/tqm8xx/startup/start.S +++ b/c/src/lib/libbsp/powerpc/tqm8xx/startup/start.S @@ -17,21 +17,21 @@ | this file contains the startup assembly code | | it is based on the gen83xx BSP | \*===============================================================*/ -/* $Id$ */ +/* $Id$ */ -#include <libcpu/powerpc-utility.h> +#include <libcpu/powerpc-utility.h> #include <rtems/powerpc/cache.h> #include <bsp.h> #include <mpc8xx.h> .extern boot_card -.section ".entry" +.section ".entry" PUBLIC_VAR (start) start: /* - * basic CPU setup: + * basic CPU setup: * init MSR */ mfmsr r30 @@ -50,7 +50,7 @@ start: start_1: mflr r20 LA r30,start_1 - sub. r20,r20,r30 + sub. r20,r20,r30 /* * execution address offset == 0? * then do not relocate code and data @@ -60,51 +60,51 @@ start_1: * 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 + /* * 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: /* * ROM or relocatable startup: copy rest of code to SDRAM */ /* 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 @@ -117,8 +117,8 @@ 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 @@ -139,19 +139,19 @@ start_code_in_ram: * init some CPU stuff */ bl SYM (_InitTQM8xx) - + /* clear arguments and do further init. in C (common for RAM/ROM startup) */ /* Clear cmdline */ 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_with_watchdog: addi r5,r5,16 rlwinm. r5,r5,28,4,31 @@ -200,7 +200,7 @@ copy_image_4word: stw r21, 4(r29) stw r22, 8(r29) stw r23,12(r29) - + addi r30, r30, 0x10 /* increment source pointer */ addi r29, r29, 0x10 /* increment destination pointer */ /* @@ -208,7 +208,7 @@ copy_image_4word: */ sth r25,14(r26) sth r24,14(r26) - + bdnz copy_image_4word /* decrement ctr and branch if not 0 */ cmpwi r27, 0x00 /* copy image finished ? */ @@ -216,19 +216,19 @@ copy_image_4word: 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 mpc8xx_zero_4( void *dest, size_t n) * @@ -278,7 +278,7 @@ mpc8xx_zero_4_tail: stwx r0, r3, r8 addi r8, r8, 16 bdnz mpc8xx_zero_4_tail - + /* Return */ blr |