#ifdef CONFIG_S3C2410_NAND_BOOT bl copy_myself
@ jump to ram ldr r1, =on_the_ram add pc, r1, #0 nop nop 1: b 1b @ infinite loop
#ifdef CONFIG_S3C2410_NAND_BOOT @ @ copy_myself: copy vivi to ram @ copy_myself: mov r10, lr
@ reset NAND mov r1, #NAND_CTL_BASE ldr r2, =0xf830 @ initial value str r2, [r1, #oNFCONF] ldr r2, [r1, #oNFCONF] bic r2, r2, #0x800 @ enable chip str r2, [r1, #oNFCONF] mov r2, #0xff @ RESET command strb r2, [r1, #oNFCMD] mov r3, #0 @ wait 1: add r3, r3, #0x1 cmp r3, #0xa blt 1b 2: ldr r2, [r1, #oNFSTAT] @ wait ready tst r2, #0x1 beq 2b ldr r2, [r1, #oNFCONF] orr r2, r2, #0x800 @ disable chip str r2, [r1, #oNFCONF]
@ get read to call C functions (for nand_read()) ldr sp, DW_STACK_START @ setup stack pointer mov fp, #0 @ no previous frame, so fp=0
@ copy vivi to RAM ldr r0, =VIVI_RAM_BASE mov r1, #0x0 mov r2, #0x20000 bl nand_read_ll
tst r0, #0x0 beq ok_nand_read #ifdef CONFIG_DEBUG_LL bad_nand_read: ldr r0, STR_FAIL ldr r1, SerBase bl PrintWord 1: b 1b @ infinite loop #endif
ok_nand_read: #ifdef CONFIG_DEBUG_LL ldr r0, STR_OK ldr r1, SerBase bl PrintWord #endif
@ verify mov r0, #0 ldr r1, =0x33f00000 mov r2, #0x400 @ 4 bytes * 1024 = 4K-bytes go_next: ldr r3, [r0], #4 ldr r4, [r1], #4 teq r3, r4 bne notmatch subs r2, r2, #4 beq done_nand_read bne go_next notmatch: #ifdef CONFIG_DEBUG_LL sub r0, r0, #4 ldr r1, SerBase bl PrintHexWord ldr r0, STR_FAIL ldr r1, SerBase bl PrintWord #endif 1: b 1b done_nand_read:
#ifdef CONFIG_DEBUG_LL ldr r0, STR_OK ldr r1, SerBase bl PrintWord #endif
mov pc, r10
@ clear memory @ r0: start address @ r1: length mem_clear: mov r2, #0 mov r3, r2 mov r4, r2 mov r5, r2 mov r6, r2 mov r7, r2 mov r8, r2 mov r9, r2
clear_loop: stmia r0!, {r2-r9} subs r1, r1, #(8 * 4) bne clear_loop
mov pc, lr
#endif @ CONFIG_S3C2410_NAND_BOOT |