From 9cdfe2810693135773602e7c98b78a4af2873a61 Mon Sep 17 00:00:00 2001 From: Becky Bruce Date: Mon, 18 Jul 2011 18:49:15 -0500 Subject: 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 Signed-off-by: Kumar Gala --- arch/powerpc/cpu/mpc85xx/cpu.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) (limited to 'arch/powerpc/cpu/mpc85xx/cpu.c') diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c index 53f0887918..ce59c2580a 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu.c +++ b/arch/powerpc/cpu/mpc85xx/cpu.c @@ -374,6 +374,8 @@ void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn, 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 @@ static int reset_tlb(phys_addr_t p_addr, u32 size, phys_addr_t *phys_offset) 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); -- cgit v1.2.1