powerpc/mpc85xx: Add clear_ddr_tlbs function
This is useful when we just want to wipe out the TLBs. There's currently
a function that resets the ddr tlbs to a different value; it is changed to
utilize this function. The new function can be used in conjunction with
setup_ddr_tlbs() for a board to temporarily map/unmap the DDR address
range as needed.
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/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c
index 53f0887..ce59c25 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu.c
@@ -374,6 +374,8 @@
unsigned int
setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg);
+void clear_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg);
+
static void dump_spd_ddr_reg(void)
{
int i, j, k, m;
@@ -460,19 +462,9 @@
u32 vstart = CONFIG_SYS_DDR_SDRAM_BASE;
unsigned long epn;
u32 tsize, valid, ptr;
- phys_addr_t rpn = 0;
int ddr_esel;
- ptr = vstart;
-
- while (ptr < (vstart + size)) {
- ddr_esel = find_tlb_idx((void *)ptr, 1);
- if (ddr_esel != -1) {
- read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn);
- disable_tlb(ddr_esel);
- }
- ptr += TSIZE_TO_BYTES(tsize);
- }
+ clear_ddr_tlbs_phys(p_addr, size>>20);
/* Setup new tlb to cover the physical address */
setup_ddr_tlbs_phys(p_addr, size>>20);