diff options
| author | Scott Wood <scottwood@freescale.com> | 2013-01-18 15:45:58 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2013-01-30 11:25:15 -0600 |
| commit | 31d084ddda7739762dd476b4fbb8a2d4b4ca1b25 (patch) | |
| tree | 9898273b31df778011825dc2cfc1034cee74cee1 /arch/powerpc/cpu/mpc85xx/tlb.c | |
| parent | 41d910118cfd30c802e037bab70754fbe5f04c7e (diff) | |
powerpc/mpc85xx: add support for MMUv2 page sizes
e6500 implements MMUv2 and supports power-of-2 page sizes rather than
power-of-4. Add support for such pages.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx/tlb.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/tlb.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/tlb.c b/arch/powerpc/cpu/mpc85xx/tlb.c index f44fadcffd8..23d33574a09 100644 --- a/arch/powerpc/cpu/mpc85xx/tlb.c +++ b/arch/powerpc/cpu/mpc85xx/tlb.c @@ -66,7 +66,7 @@ void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn, _mas1 = mfspr(MAS1); *valid = (_mas1 & MAS1_VALID); - *tsize = (_mas1 >> 8) & 0xf; + *tsize = (_mas1 >> 7) & 0x1f; *epn = mfspr(MAS2) & MAS2_EPN; *rpn = mfspr(MAS3) & MAS3_RPN; #ifdef CONFIG_ENABLE_36BIT_PHYS @@ -156,6 +156,13 @@ void set_tlb(u8 tlb, u32 epn, u64 rpn, if (tlb == 1) use_tlb_cam(esel); + if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1 && + tsize & 1) { + printf("%s: bad tsize %d on entry %d at 0x%08x\n", + __func__, tsize, tlb, epn); + return; + } + _mas0 = FSL_BOOKE_MAS0(tlb, esel, 0); _mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize); _mas2 = FSL_BOOKE_MAS2(epn, wimge); @@ -251,7 +258,7 @@ setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg) unsigned int tlb_size; unsigned int wimge = MAS2_M; unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE; - unsigned int max_cam; + unsigned int max_cam, tsize_mask; u64 size, memsize = (u64)memsize_in_meg << 20; #ifdef CONFIG_SYS_PPC_DDR_WIMGE @@ -261,15 +268,17 @@ setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg) if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1) { /* Convert (4^max) kB to (2^max) bytes */ max_cam = ((mfspr(SPRN_TLB1CFG) >> 16) & 0xf) * 2 + 10; + tsize_mask = ~1U; } else { /* Convert (2^max) kB to (2^max) bytes */ max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 10; + tsize_mask = ~0U; } for (i = 0; size && i < 8; i++) { int ram_tlb_index = find_free_tlbcam(); - u32 camsize = __ilog2_u64(size) & ~1U; - u32 align = __ilog2(ram_tlb_address) & ~1U; + u32 camsize = __ilog2_u64(size) & tsize_mask; + u32 align = __ilog2(ram_tlb_address) & tsize_mask; if (ram_tlb_index == -1) break; @@ -281,7 +290,7 @@ setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg) if (camsize > max_cam) camsize = max_cam; - tlb_size = (camsize - 10) / 2; + tlb_size = camsize - 10; set_tlb(1, ram_tlb_address, p_addr, MAS3_SX|MAS3_SW|MAS3_SR, wimge, |