diff options
| author | York Sun <yorksun@freescale.com> | 2014-06-24 21:16:20 -0700 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2014-07-22 16:25:54 -0700 |
| commit | 9d0456822c4fec302608d4161ae9d9cfe81100b1 (patch) | |
| tree | 99bd746329769a750488156d567f86ff3021fd4c /board/freescale/t104xrdb | |
| parent | 8340e7ac86ad3c59956e8f0bd627b741e5209439 (diff) | |
powerpc/mpc85xx: Check return value of find_tlb_idx
find_tlb_idx() is called in board_early_init_r() on multiple boards.
The return value is not checked before being used to disable a TLB.
In normal case the return value wouldn't be -1. In case of a mis-
configuration during porting to a new board, checking the return value
may be helpful to reveal some user errors.
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'board/freescale/t104xrdb')
| -rw-r--r-- | board/freescale/t104xrdb/t104xrdb.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/board/freescale/t104xrdb/t104xrdb.c b/board/freescale/t104xrdb/t104xrdb.c index a5e5fffac4..ddb669fb06 100644 --- a/board/freescale/t104xrdb/t104xrdb.c +++ b/board/freescale/t104xrdb/t104xrdb.c @@ -48,7 +48,7 @@ int board_early_init_r(void) { #ifdef CONFIG_SYS_FLASH_BASE const unsigned int flashbase = CONFIG_SYS_FLASH_BASE; - const u8 flash_esel = find_tlb_idx((void *)flashbase, 1); + int flash_esel = find_tlb_idx((void *)flashbase, 1); /* * Remap Boot flash region to caching-inhibited @@ -59,8 +59,14 @@ int board_early_init_r(void) flush_dcache(); invalidate_icache(); - /* invalidate existing TLB entry for flash */ - disable_tlb(flash_esel); + if (flash_esel == -1) { + /* very unlikely unless something is messed up */ + puts("Error: Could not find TLB for FLASH BASE\n"); + flash_esel = 2; /* give our best effort to continue */ + } else { + /* invalidate existing TLB entry for flash */ + disable_tlb(flash_esel); + } set_tlb(1, flashbase, CONFIG_SYS_FLASH_BASE_PHYS, MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, |