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| author | Julius Baxter <juliusbaxter@gmail.com> | 2012-05-05 12:32:11 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2012-08-09 23:37:45 +0200 |
| commit | 3874a377451e4d1f45710f5bf801dd96e8b8f67e (patch) | |
| tree | c9ecb29bc7b72a91affc6ab25e8950cb5ebc483c /arch/openrisc/cpu/cpu.c | |
| parent | eb0b43f264077fb7ff53b479dce76324a8aaa696 (diff) | |
| download | u-boot-imx-3874a377451e4d1f45710f5bf801dd96e8b8f67e.zip u-boot-imx-3874a377451e4d1f45710f5bf801dd96e8b8f67e.tar.gz u-boot-imx-3874a377451e4d1f45710f5bf801dd96e8b8f67e.tar.bz2 | |
openrisc: Work around potential relocation issues
When reset code is in flash, the jump instructions emitted by the
compiler are relative instead of absolute jumps.
A fix to the reset code to make correct jumps to the beginning of
code relocated to RAM have also been added.
Signed-off-by: Julius Baxter <juliusbaxter@gmail.com>
Diffstat (limited to 'arch/openrisc/cpu/cpu.c')
| -rw-r--r-- | arch/openrisc/cpu/cpu.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/openrisc/cpu/cpu.c b/arch/openrisc/cpu/cpu.c index 25cd624..73ecc6f 100644 --- a/arch/openrisc/cpu/cpu.c +++ b/arch/openrisc/cpu/cpu.c @@ -151,7 +151,11 @@ extern void __reset(void); int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { disable_interrupts(); - __reset(); + /* Code the jump to __reset here as the compiler is prone to + emitting a bad jump instruction if the function is in flash */ + __asm__("l.movhi r1,hi(__reset); \ + l.ori r1,r1,lo(__reset); \ + l.jr r1"); /* not reached, __reset does not return */ return 0; } |