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ARM i.MX: Fix booting from NOR when external nand boot is enabled 

We cannot jump to SDRAM unconditionally in imx*_barebox_boot_nand_external.
When we really boot from NOR flash the binary is not yet copied to SDRAM.
Instead, let the return value of imx_barebox_boot_nand_external() indicate
whether we really boot from NAND and only jump to SDRAM in this case.
Otherwise just continue to the normal SoC specific entry.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-02-26 09:13:31 +01:00
parent 8c82b1b202
commit 94466be718
1 changed files with 29 additions and 17 deletions
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46
arch/arm/mach-imx/external-nand-boot.c
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@ -280,7 +280,7 @@ static __bare_init __naked void jump_sdram(unsigned long offset)
* running inside the NFC address space. If not, barebox is started from the
* currently running address without loading anything from NAND.
*/
void __bare_init imx_barebox_boot_nand_external(unsigned long nfc_base)
int __bare_init imx_barebox_boot_nand_external(unsigned long nfc_base)
{
u32 r;
u32 *src, *trg;
@ -289,7 +289,7 @@ void __bare_init imx_barebox_boot_nand_external(unsigned long nfc_base)
/* skip NAND boot if not running from NFC space */
r = get_pc();
if (r < nfc_base || r > nfc_base + 0x800)
return;
return 0;
src = (unsigned int *)nfc_base;
trg = (unsigned int *)_text;
@ -297,6 +297,8 @@ void __bare_init imx_barebox_boot_nand_external(unsigned long nfc_base)
/* Move ourselves out of NFC SRAM */
for (i = 0; i < 0x800 / sizeof(int); i++)
*trg++ = *src++;
return 1;
}
/*
@ -310,9 +312,11 @@ void __bare_init __noreturn imx21_barebox_boot_nand_external(void)
{
unsigned long nfc_base = MX21_NFC_BASE_ADDR;
imx_barebox_boot_nand_external(nfc_base);
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
if (imx_barebox_boot_nand_external(nfc_base)) {
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
}
imx21_barebox_entry(0);
}
#endif
@ -322,9 +326,11 @@ void __bare_init __noreturn imx25_barebox_boot_nand_external(void)
{
unsigned long nfc_base = MX25_NFC_BASE_ADDR;
imx_barebox_boot_nand_external(nfc_base);
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
if (imx_barebox_boot_nand_external(nfc_base)) {
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
}
imx25_barebox_entry(0);
}
#endif
@ -334,9 +340,11 @@ void __bare_init __noreturn imx27_barebox_boot_nand_external(void)
{
unsigned long nfc_base = MX27_NFC_BASE_ADDR;
imx_barebox_boot_nand_external(nfc_base);
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
if (imx_barebox_boot_nand_external(nfc_base)) {
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
}
imx27_barebox_entry(0);
}
#endif
@ -346,9 +354,11 @@ void __bare_init __noreturn imx31_barebox_boot_nand_external(void)
{
unsigned long nfc_base = MX31_NFC_BASE_ADDR;
imx_barebox_boot_nand_external(nfc_base);
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
if (imx_barebox_boot_nand_external(nfc_base)) {
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
}
imx31_barebox_entry(0);
}
#endif
@ -358,9 +368,11 @@ void __bare_init __noreturn imx35_barebox_boot_nand_external(void)
{
unsigned long nfc_base = MX35_NFC_BASE_ADDR;
imx_barebox_boot_nand_external(nfc_base);
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
if (imx_barebox_boot_nand_external(nfc_base)) {
jump_sdram(nfc_base - (unsigned long)_text);
imx_nand_load_image((void *)_text, barebox_image_size);
}
imx35_barebox_entry(0);
}
#endif