mpc85xx: Add print_tlbcam() function

This dumps out the contents of TLB1 on 85xx-based systems.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/cpu/mpc85xx/tlb.c b/arch/powerpc/cpu/mpc85xx/tlb.c
index eebb6ae..f2833a5 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/tlb.c
+++ b/arch/powerpc/cpu/mpc85xx/tlb.c
@@ -74,6 +74,26 @@ void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn,
 }
 
 #ifndef CONFIG_NAND_SPL
+void print_tlbcam(void)
+{
+       int i;
+       unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff;
+
+       /* walk all the entries */
+       printf("TLBCAM entries\n");
+       for (i = 0; i < num_cam; i++) {
+               unsigned long epn;
+               u32 tsize, valid;
+               phys_addr_t rpn;
+
+               read_tlbcam_entry(i, &valid, &tsize, &epn, &rpn);
+               printf("entry %02d: V: %d EPN 0x%08x RPN 0x%08llx size:",
+                       i, (valid == 0) ? 0 : 1, (unsigned int)epn,
+                       (unsigned long long)rpn);
+               print_size(TSIZE_TO_BYTES(tsize), "\n");
+       }
+}
+
 static inline void use_tlb_cam(u8 idx)
 {
        int i = idx / 32;

diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index d4c7b75..c01c85f 100644 (file)
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -486,6 +486,7 @@ extern void init_tlbs(void);
 extern int find_tlb_idx(void *addr, u8 tlbsel);
 extern void init_used_tlb_cams(void);
 extern int find_free_tlbcam(void);
+extern void print_tlbcam(void);
 
 extern unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg);