powerpc/mpc85xx: Check return value of find_tlb_idx

[oweals/u-boot.git] / board / freescale / mpc8572ds / mpc8572ds.c

diff --git a/board/freescale/mpc8572ds/mpc8572ds.c b/board/freescale/mpc8572ds/mpc8572ds.c
index 56863222c869f2062ffdfc6b60d31d751adf599a..1bbf83214873d35a41974dddca61f6c9d8de3181 100644 (file)
--- a/board/freescale/mpc8572ds/mpc8572ds.c
+++ b/board/freescale/mpc8572ds/mpc8572ds.c
@@ -144,7 +144,7 @@ void pci_init_board(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
@@ -155,8 +155,14 @@ int board_early_init_r(void)
        flush_dcache();
        invalidate_icache();
 
-       /* invalidate existing TLB entry for flash + promjet */
-       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 + promjet */
+               disable_tlb(flash_esel);
+       }
 
        set_tlb(1, flashbase, CONFIG_SYS_FLASH_BASE_PHYS,       /* tlb, epn, rpn */
                        MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */