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mpc85xx: tlb.c cleanups

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Extract the operation to read a tlb into a function - we will need
this later to print out the tlbs, and there's no point in duplicating
the code.  Create a TSIZE_TO_BYTES macro to deal with the conversion
from the MAS field to an actual size instead of duplicating this in code.
There are a few misc other minor cleanups.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Becky Bruce 2010-06-17 11:37:21 -05:00 committed by Kumar Gala
parent f51cdaf191
commit 4e63df300f
2 changed files with 25 additions and 26 deletions
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50
arch/powerpc/cpu/mpc85xx/tlb.c
View File

@ -55,6 +55,24 @@ void init_tlbs(void)
return ;
}
void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn,
phys_addr_t *rpn)
{
u32 _mas1;
mtspr(MAS0, FSL_BOOKE_MAS0(1, idx, 0));
asm volatile("tlbre;isync");
_mas1 = mfspr(MAS1);
*valid = (_mas1 & MAS1_VALID);
*tsize = (_mas1 >> 8) & 0xf;
*epn = mfspr(MAS2) & MAS2_EPN;
*rpn = mfspr(MAS3) & MAS3_RPN;
#ifdef CONFIG_ENABLE_36BIT_PHYS
*rpn |= ((u64)mfspr(MAS7)) << 32;
#endif
}
#ifndef CONFIG_NAND_SPL
static inline void use_tlb_cam(u8 idx)
{
@ -82,15 +100,9 @@ void init_used_tlb_cams(void)
/* walk all the entries */
for (i = 0; i < num_cam; i++) {
u32 _mas1;
mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
asm volatile("tlbre;isync");
_mas1 = mfspr(MAS1);
/* if the entry isn't valid skip it */
if ((_mas1 & MAS1_VALID))
if (mfspr(MAS1) & MAS1_VALID)
use_tlb_cam(i);
}
}
@ -134,7 +146,7 @@ void set_tlb(u8 tlb, u32 epn, u64 rpn,
#ifdef CONFIG_ADDR_MAP
if ((tlb == 1) && (gd->flags & GD_FLG_RELOC))
addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), esel);
addrmap_set_entry(epn, rpn, TSIZE_TO_BYTES(tsize), esel);
#endif
}
@ -201,26 +213,12 @@ void init_addr_map(void)
/* walk all the entries */
for (i = 0; i < num_cam; i++) {
unsigned long epn;
u32 tsize, _mas1;
u32 tsize, valid;
phys_addr_t rpn;
mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
asm volatile("tlbre;isync");
_mas1 = mfspr(MAS1);
/* if the entry isn't valid skip it */
if (!(_mas1 & MAS1_VALID))
continue;
tsize = (_mas1 >> 8) & 0xf;
epn = mfspr(MAS2) & MAS2_EPN;
rpn = mfspr(MAS3) & MAS3_RPN;
#ifdef CONFIG_ENABLE_36BIT_PHYS
rpn |= ((phys_addr_t)mfspr(MAS7)) << 32;
#endif
addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), i);
read_tlbcam_entry(i, &valid, &tsize, &epn, &rpn);
if (valid & MAS1_VALID)
addrmap_set_entry(epn, rpn, TSIZE_TO_BYTES(tsize), i);
}
return ;

1
arch/powerpc/include/asm/mmu.h
View File

@ -402,6 +402,7 @@ extern void print_bats(void);
#define MAS1_TID(x) ((x << 16) & 0x3FFF0000)
#define MAS1_TS 0x00001000
#define MAS1_TSIZE(x) ((x << 8) & 0x00000F00)
#define TSIZE_TO_BYTES(x) ((phys_addr_t)(1UL << ((tsize * 2) + 10)))
#define MAS2_EPN 0xFFFFF000
#define MAS2_X0 0x00000040