diff options
| -rw-r--r-- | arch/nios2/cpu/start.S | 61 |
1 files changed, 30 insertions, 31 deletions
diff --git a/arch/nios2/cpu/start.S b/arch/nios2/cpu/start.S index 6c7c777..501ac39 100644 --- a/arch/nios2/cpu/start.S +++ b/arch/nios2/cpu/start.S @@ -9,16 +9,14 @@ #include <config.h> #include <version.h> -/************************************************************************* - * RESTART - ************************************************************************/ - + /* RESTART */ .text .global _start _start: wrctl status, r0 /* Disable interrupts */ - /* ICACHE INIT -- only the icache line at the reset address + /* + * ICACHE INIT -- only the icache line at the reset address * is invalidated at reset. So the init must stay within * the cache line size (8 words). If GERMS is used, we'll * just be invalidating the cache a second time. If cache @@ -32,7 +30,8 @@ _start: bgt r5, r0, 0b br _except_end /* Skip the tramp */ - /* EXCEPTION TRAMPOLINE -- the following gets copied + /* + * EXCEPTION TRAMPOLINE -- the following gets copied * to the exception address (below), but is otherwise at the * default exception vector offset (0x0020). */ @@ -42,12 +41,14 @@ _except_start: jmp et _except_end: - /* INTERRUPTS -- for now, all interrupts masked and globally + /* + * INTERRUPTS -- for now, all interrupts masked and globally * disabled. */ wrctl ienable, r0 /* All disabled */ - /* DCACHE INIT -- if dcache not implemented, initd behaves as + /* + * DCACHE INIT -- if dcache not implemented, initd behaves as * nop. */ movhi r4, %hi(CONFIG_SYS_DCACHELINE_SIZE) @@ -59,7 +60,8 @@ _except_end: add r6, r6, r4 bltu r6, r5, 1b - /* RELOCATE CODE, DATA & COMMAND TABLE -- the following code + /* + * RELOCATE CODE, DATA & COMMAND TABLE -- the following code * assumes code, data and the command table are all * contiguous. This lets us relocate everything as a single * block. Make sure the linker script matches this ;-) @@ -89,7 +91,8 @@ _cur: movhi r5, %hi(_cur - _start) jmp r4 _reloc: - /* COPY EXCEPTION TRAMPOLINE -- copy the tramp to the + /* + * COPY EXCEPTION TRAMPOLINE -- copy the tramp to the * exception address. Define CONFIG_ROM_STUBS to prevent * the copy (e.g. exception in flash or in other * softare/firmware component). @@ -111,8 +114,7 @@ _reloc: 7: #endif - /* STACK INIT -- zero top two words for call back chain. - */ + /* STACK INIT -- zero top two words for call back chain. */ movhi sp, %hi(CONFIG_SYS_INIT_SP) ori sp, sp, %lo(CONFIG_SYS_INIT_SP) addi sp, sp, -8 @@ -130,34 +132,31 @@ _reloc: mov sp, r2 mov fp, sp - /* - * Call board_init_f -- never returns - */ + /* Call board_init_f -- never returns */ mov r4, r0 movhi r2, %hi(board_init_f@h) ori r2, r2, %lo(board_init_f@h) callr r2 - /* NEVER RETURNS -- but branch to the _start just + /* + * NEVER RETURNS -- but branch to the _start just * in case ;-) */ br _start - - -/* - * relocate_code -- Nios2 handles the relocation above. But - * the generic board code monkeys with the heap, stack, etc. - * (it makes some assumptions that may not be appropriate - * for Nios). Nevertheless, we capitulate here. - * - * We'll call the board_init_r from here since this isn't - * supposed to return. - * - * void relocate_code (ulong sp, gd_t *global_data, - * ulong reloc_addr) - * __attribute__ ((noreturn)); - */ + /* + * relocate_code -- Nios2 handles the relocation above. But + * the generic board code monkeys with the heap, stack, etc. + * (it makes some assumptions that may not be appropriate + * for Nios). Nevertheless, we capitulate here. + * + * We'll call the board_init_r from here since this isn't + * supposed to return. + * + * void relocate_code (ulong sp, gd_t *global_data, + * ulong reloc_addr) + * __attribute__ ((noreturn)); + */ .text .global relocate_code |