powerpc/mpc85xx: Check return value of find_tlb_idx

[karo-tx-uboot.git] / board / freescale / t4qds / t4240emu.c

diff --git a/board/freescale/t4qds/t4240emu.c b/board/freescale/t4qds/t4240emu.c
index 7a610367da4322fff5853d40dc4df4c37e9f31b0..479e124a3969d13f9b2bc6b5c95dc44827267529 100644 (file)
--- a/board/freescale/t4qds/t4240emu.c
+++ b/board/freescale/t4qds/t4240emu.c
@@ -32,7 +32,7 @@ int checkboard(void)
 int board_early_init_r(void)
 {
        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 + PROMJET region to caching-inhibited
@@ -43,8 +43,14 @@ 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_SW|MAS3_SR, MAS2_I|MAS2_G,