OneNAND IPL has common codes for RAM init, load data, and jump to 2nd bootloader, but it's common code used about 300~400 bytes. So board specific codes, such as lowlevel_init, can't has enough code. It make a difficult to implement OneNAND IPL.
his patch make this common code as small as possible. and give lowlevel_init can have more codes.
Signed-off-by: Kyungmin Park kyungmin.park@samsung.com --- diff --git a/cpu/arm1136/start.S b/cpu/arm1136/start.S index e622338..c115003 100644 --- a/cpu/arm1136/start.S +++ b/cpu/arm1136/start.S @@ -33,23 +33,7 @@ .globl _start _start: b reset #ifdef CONFIG_ONENAND_IPL - ldr pc, _hang - ldr pc, _hang - ldr pc, _hang - ldr pc, _hang - ldr pc, _hang - ldr pc, _hang - ldr pc, _hang - -_hang: - .word do_hang - .word 0x12345678 - .word 0x12345678 - .word 0x12345678 - .word 0x12345678 - .word 0x12345678 - .word 0x12345678 - .word 0x12345678 /* now 16*4=64 */ + . = _start + 64 #else ldr pc, _undefined_instruction ldr pc, _software_interrupt @@ -362,12 +346,7 @@ cpu_init_crit: /* * exception handlers */ -#ifdef CONFIG_ONENAND_IPL - .align 5 -do_hang: - ldr sp, _TEXT_BASE /* use 32 words about stack */ - bl hang /* hang and never return */ -#else /* !CONFIG_ONENAND IPL */ +#ifndef CONFIG_ONENAND_IPL .align 5 undefined_instruction: get_bad_stack diff --git a/onenand_ipl/onenand_boot.c b/onenand_ipl/onenand_boot.c index aff62d2..04735e7 100644 --- a/onenand_ipl/onenand_boot.c +++ b/onenand_ipl/onenand_boot.c @@ -28,54 +28,17 @@
#include "onenand_ipl.h"
-#ifdef CONFIG_SYS_PRINTF -int print_info(void) -{ - printf(XLOADER_VERSION); - - return 0; -} -#endif - typedef int (init_fnc_t)(void);
-init_fnc_t *init_sequence[] = { - board_init, /* basic board dependent setup */ -#ifdef CONFIG_SYS_PRINTF - serial_init, /* serial communications setup */ - print_info, -#endif - NULL, -}; - void start_oneboot(void) { - init_fnc_t **init_fnc_ptr; uchar *buf;
- for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { - if ((*init_fnc_ptr)() != 0) - hang(); - } - buf = (uchar *) CONFIG_SYS_LOAD_ADDR;
- if (!onenand_read_block0(buf)) - buf += ONENAND_BLOCK_SIZE; - - if (buf == (uchar *)CONFIG_SYS_LOAD_ADDR) - hang(); + onenand_read_block0(buf);
- /* go run U-Boot and never return */ - printf("Starting OS Bootloader...\n"); ((init_fnc_t *)CONFIG_SYS_LOAD_ADDR)();
/* should never come here */ } - -void hang(void) -{ - /* if board_hang() returns, hange here */ - printf("X-Loader hangs\n"); - for (;;); -} diff --git a/onenand_ipl/onenand_ipl.h b/onenand_ipl/onenand_ipl.h index 3387998..57e54f5 100644 --- a/onenand_ipl/onenand_ipl.h +++ b/onenand_ipl/onenand_ipl.h @@ -23,12 +23,6 @@
#include <linux/mtd/onenand_regs.h>
-#define ONENAND_BLOCK_SIZE 2048 - -#ifndef CONFIG_SYS_PRINTF -#define printf(format, args...) -#endif - #define onenand_readw(a) readw(a) #define onenand_writew(v, a) writew(v, a)