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[SPARC64]: Use ASI_SCRATCHPAD address 0x0 properly.

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This is where the virtual address of the fault status
area belongs.

To set it up we don't make a hypervisor call, instead
we call OBP's SUNW,set-trap-table with the real address
of the fault status area as the second argument.  And
right before that call we write the virtual address into
ASI_SCRATCHPAD vaddr 0x0.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-10 15:39:51 -08:00
parent 1839794464
commit 12eaa328f9
9 changed files with 144 additions and 192 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
include/asm-sparc64/cpudata.h
View File

@@ -156,13 +156,16 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
nop; \
.previous;
/* Clobbers TMP, current address space PGD phys address into DEST. */
#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
__GET_CPUID(TMP) \
sethi %hi(trap_block), DEST; \
sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
or DEST, %lo(trap_block), DEST; \
add DEST, TMP, DEST; \
/* Clobbers TMP, current address space PGD phys address into DEST. */
#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
@@ -175,11 +178,8 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
/* Clobbers TMP, loads DEST with current thread info pointer. */
#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
__GET_CPUID(TMP) \
sethi %hi(trap_block), DEST; \
sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
or DEST, %lo(trap_block), DEST; \
ldx [DEST + TMP], DEST;
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
/* Given the current thread info pointer in THR, load the per-cpu
* area base of the current processor into DEST. REG1, REG2, and REG3 are
@@ -201,13 +201,13 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
#else
#define __GET_CPUID(REG) \
mov 0, REG;
#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
sethi %hi(trap_block), DEST; \
or DEST, %lo(trap_block), DEST; \
/* Uniprocessor versions, we know the cpuid is zero. */
#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
sethi %hi(trap_block), DEST; \
or DEST, %lo(trap_block), DEST; \
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
#define TRAP_LOAD_IRQ_WORK(DEST, TMP) \
@@ -215,8 +215,8 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
or DEST, %lo(__irq_work), DEST;
#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
sethi %hi(trap_block), DEST; \
ldx [DEST + %lo(trap_block)], DEST;
TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
ldx [DEST + TRAP_PER_CPU_THREAD], DEST;
/* No per-cpu areas on uniprocessor, so no need to load DEST. */
#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)

1
include/asm-sparc64/oplib.h
View File

@@ -338,6 +338,7 @@ int cpu_find_by_mid(int mid, int *prom_node);
/* Client interface level routines. */
extern void prom_set_trap_table(unsigned long tba);
extern void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa);
extern long p1275_cmd(const char *, long, ...);

34
include/asm-sparc64/ttable.h
View File

@@ -180,25 +180,25 @@
#define KPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl)
#endif
#define SUN4V_ITSB_MISS \
mov SCRATCHPAD_CPUID, %g1; \
ldxa [%g1] ASI_SCRATCHPAD, %g2; \
ldxa [%g1 + %g1] ASI_SCRATCHPAD, %g1;\
sethi %hi(trap_block), %g5; \
sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2; \
or %g5, %lo(trap_block), %g5; \
ba,pt %xcc, sun4v_itsb_miss; \
add %g5, %g2, %g5;
#define SUN4V_ITSB_MISS \
ldxa [%g0] ASI_SCRATCHPAD, %g2; \
ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4; \
ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5; \
srlx %g4, 22, %g7; \
sllx %g5, 48, %g6; \
brz,pn %g5, kvmap_itlb_4v; \
or %g6, %g7, %g6; \
ba,a,pt %xcc, sun4v_itsb_miss;
#define SUN4V_DTSB_MISS \
mov SCRATCHPAD_CPUID, %g1; \
ldxa [%g1] ASI_SCRATCHPAD, %g2; \
ldxa [%g1 + %g1] ASI_SCRATCHPAD, %g1;\
sethi %hi(trap_block), %g5; \
sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2; \
or %g5, %lo(trap_block), %g5; \
ba,pt %xcc, sun4v_dtsb_miss; \
add %g5, %g2, %g5;
ldxa [%g0] ASI_SCRATCHPAD, %g2; \
ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4; \
ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5; \
srlx %g4, 22, %g7; \
sllx %g5, 48, %g6; \
brz,pn %g5, kvmap_dtlb_4v; \
or %g6, %g7, %g6; \
ba,a,pt %xcc, sun4v_dtsb_miss;
/* Before touching these macros, you owe it to yourself to go and
* see how arch/sparc64/kernel/winfixup.S works... -DaveM