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.p...@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)
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