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| author | Wolfgang Wegner <w.wegner@astro-kom.de> | 2010-03-02 10:59:20 +0100 |
|---|---|---|
| committer | TsiChung Liew <tsicliew@gmail.com> | 2010-03-04 01:46:53 -0600 |
| commit | c7de810c79a00aa6fc08900ee0bb57bd295db733 (patch) | |
| tree | a9438f0823000b68a17fb92d0648cb33dd1876cd | |
| parent | bb907ab51fd04255923b7ecf9dab352078808351 (diff) | |
| download | u-boot-imx-c7de810c79a00aa6fc08900ee0bb57bd295db733.zip u-boot-imx-c7de810c79a00aa6fc08900ee0bb57bd295db733.tar.gz u-boot-imx-c7de810c79a00aa6fc08900ee0bb57bd295db733.tar.bz2 | |
allow MCF532x to use CONFIG_MONITOR_IS_IN_RAM
CONFIG_MONITOR_IS_IN_RAM is broken for MCF532x. This patch fixes this
by conditionally
- removing the vector table at the beginning of code
- not overwriting the vector base register
- removing the code to re-set the PLL, which effectively disables
SDRAM access
Signed-off-by: Wolfgang Wegner <w.wegner@astro-kom.de>
| -rw-r--r-- | cpu/mcf532x/speed.c | 3 | ||||
| -rw-r--r-- | cpu/mcf532x/start.S | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/cpu/mcf532x/speed.c b/cpu/mcf532x/speed.c index 0d378e6..67f08c7 100644 --- a/cpu/mcf532x/speed.c +++ b/cpu/mcf532x/speed.c @@ -204,6 +204,8 @@ int clock_pll(int fsys, int flags) fout = ((fref * mfd) / (BUSDIV * 4)); #endif +/* must not tamper with SDRAMC if running from SDRAM */ +#if !defined(CONFIG_MONITOR_IS_IN_RAM) /* * Check to see if the SDRAM has already been initialized. * If it has then the SDRAM needs to be put into self refresh @@ -254,6 +256,7 @@ int clock_pll(int fsys, int flags) /* wait for DQS logic to relock */ for (i = 0; i < 0x200; i++) ; +#endif /* !defined(CONFIG_MONITOR_IS_IN_RAM) */ return fout; } diff --git a/cpu/mcf532x/start.S b/cpu/mcf532x/start.S index ff13a9f..5b134aa 100644 --- a/cpu/mcf532x/start.S +++ b/cpu/mcf532x/start.S @@ -45,6 +45,7 @@ addl #60,%sp; /* space for 15 regs */ \ rte; +#if !defined(CONFIG_MONITOR_IS_IN_RAM) .text /* * Vector table. This is used for initial platform startup. @@ -121,6 +122,7 @@ vector192_255: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +#endif /* !defined(CONFIG_MONITOR_IS_IN_RAM) */ .text @@ -130,9 +132,11 @@ _start: nop move.w #0x2700,%sr /* Mask off Interrupt */ +#if !defined(CONFIG_MONITOR_IS_IN_RAM) /* Set vector base register at the beginning of the Flash */ move.l #CONFIG_SYS_FLASH_BASE, %d0 movec %d0, %VBR +#endif move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 |