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| author | Eric Sun <jian.sun@freescale.com> | 2012-12-03 18:47:47 +0800 |
|---|---|---|
| committer | Eric Sun <jian.sun@freescale.com> | 2012-12-03 18:55:19 +0800 |
| commit | 2ff6f45780995b06faab268f6130d68565e96ba5 (patch) | |
| tree | 52e69c6ea084d4db3eb8d1d516a2c32a3fed3dd6 /board/freescale/mx6sl_arm2 | |
| parent | 5d743e40a0164b71edeeed8260c74cbea3484282 (diff) | |
| download | u-boot-imx-2ff6f45780995b06faab268f6130d68565e96ba5.zip u-boot-imx-2ff6f45780995b06faab268f6130d68565e96ba5.tar.gz u-boot-imx-2ff6f45780995b06faab268f6130d68565e96ba5.tar.bz2 | |
ENGR00235564: i.mx6 u-boot: change plugin to use ROM API table for code jump
The original plugin code uses hard coded assembly address for the code jump
to "pu_irom_hwcnfg_setup", it can only works for specific chip version, for
a new TO, the assembly address will change, and the plugin code simply fails.
In fact there is an API entry table in a fixed ROM location, it contains the
entry to the "pu_irom_hwcnfg_setup". This patch retrieve the jump address
from this API table, thus avoid the limitation for current implementation.
Apply to all plugin enabled platforms, MX6Q/DL ARM2, MX6SL ARM2/EVK
Signed-off-by: Eric Sun <jian.sun@freescale.com>
Diffstat (limited to 'board/freescale/mx6sl_arm2')
| -rw-r--r-- | board/freescale/mx6sl_arm2/flash_header.S | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/board/freescale/mx6sl_arm2/flash_header.S b/board/freescale/mx6sl_arm2/flash_header.S index 4c2475e..c034beb 100644 --- a/board/freescale/mx6sl_arm2/flash_header.S +++ b/board/freescale/mx6sl_arm2/flash_header.S @@ -375,6 +375,9 @@ MXC_DCD_ITEM(72, MMDC_P0_BASE_ADDR + 0x01c, 0x00000000) #else +#define ROM_API_TABLE_BASE_ADDR (0x000000C0) +#define ROM_API_HWCNFG_SETUP_OFFSET (0x08) + .section ".text.flasheader", "x" origin: b _start @@ -672,9 +675,9 @@ plugin_start: * pu_irom_hwcnfg_setup is in 0x1f20 */ before_calling_rom___pu_irom_hwcnfg_setup: - mov r4, #0x1f00 - add r4, r4, #0x21 - blx r4 /* This address might change in future ROM versions */ + ldr r3, =ROM_API_TABLE_BASE_ADDR + ldr r4, [r3, #ROM_API_HWCNFG_SETUP_OFFSET] + blx r4 after_calling_rom___pu_irom_hwcnfg_setup: /* To return to ROM from plugin, we need to fill in these argument. |