[SPARC64]: Use ASI_SCRATCHPAD address 0x0 properly.
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>
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index d048f0d..f581f0e 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -521,11 +521,36 @@
wrpr %g0, 15, %pil
/* Make the firmware call to jump over to the Linux trap table. */
- call prom_set_trap_table
+ sethi %hi(is_sun4v), %o0
+ lduw [%o0 + %lo(is_sun4v)], %o0
+ brz,pt %o0, 1f
+ nop
+
+ TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
+ add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
+ stxa %g2, [%g0] ASI_SCRATCHPAD
+
+ /* Compute physical address:
+ *
+ * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
+ */
+ sethi %hi(KERNBASE), %g3
+ sub %g2, %g3, %g2
+ sethi %hi(kern_base), %g3
+ ldx [%g3 + %lo(kern_base)], %g3
+ add %g2, %g3, %o1
+
+ call prom_set_trap_table_sun4v
+ sethi %hi(sparc64_ttable_tl0), %o0
+
+ ba,pt %xcc, 2f
+ nop
+
+1: call prom_set_trap_table
sethi %hi(sparc64_ttable_tl0), %o0
/* Start using proper page size encodings in ctx register. */
- sethi %hi(sparc64_kern_pri_context), %g3
+2: sethi %hi(sparc64_kern_pri_context), %g3
ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2
mov PRIMARY_CONTEXT, %g1
diff --git a/arch/sparc64/kernel/sun4v_ivec.S b/arch/sparc64/kernel/sun4v_ivec.S
index d9d4420..c0367ef 100644
--- a/arch/sparc64/kernel/sun4v_ivec.S
+++ b/arch/sparc64/kernel/sun4v_ivec.S
@@ -22,11 +22,8 @@
nop
/* Get &trap_block[smp_processor_id()] into %g3. */
- __GET_CPUID(%g1)
- sethi %hi(trap_block), %g3
- sllx %g1, TRAP_BLOCK_SZ_SHIFT, %g7
- or %g3, %lo(trap_block), %g3
- add %g3, %g7, %g3
+ ldxa [%g0] ASI_SCRATCHPAD, %g3
+ sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3
/* Get CPU mondo queue base phys address into %g7. */
ldx [%g3 + TRAP_PER_CPU_CPU_MONDO_PA], %g7
@@ -74,11 +71,8 @@
nop
/* Get &trap_block[smp_processor_id()] into %g3. */
- __GET_CPUID(%g1)
- sethi %hi(trap_block), %g3
- sllx %g1, TRAP_BLOCK_SZ_SHIFT, %g7
- or %g3, %lo(trap_block), %g3
- add %g3, %g7, %g3
+ ldxa [%g0] ASI_SCRATCHPAD, %g3
+ sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3
/* Get DEV mondo queue base phys address into %g5. */
ldx [%g3 + TRAP_PER_CPU_DEV_MONDO_PA], %g5
@@ -143,11 +137,8 @@
nop
/* Get &trap_block[smp_processor_id()] into %g3. */
- __GET_CPUID(%g1)
- sethi %hi(trap_block), %g3
- sllx %g1, TRAP_BLOCK_SZ_SHIFT, %g7
- or %g3, %lo(trap_block), %g3
- add %g3, %g7, %g3
+ ldxa [%g0] ASI_SCRATCHPAD, %g3
+ sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3
/* Get RES mondo queue base phys address into %g5. */
ldx [%g3 + TRAP_PER_CPU_RESUM_MONDO_PA], %g5
@@ -251,11 +242,8 @@
nop
/* Get &trap_block[smp_processor_id()] into %g3. */
- __GET_CPUID(%g1)
- sethi %hi(trap_block), %g3
- sllx %g1, TRAP_BLOCK_SZ_SHIFT, %g7
- or %g3, %lo(trap_block), %g3
- add %g3, %g7, %g3
+ ldxa [%g0] ASI_SCRATCHPAD, %g3
+ sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3
/* Get RES mondo queue base phys address into %g5. */
ldx [%g3 + TRAP_PER_CPU_NONRESUM_MONDO_PA], %g5
diff --git a/arch/sparc64/kernel/sun4v_tlb_miss.S b/arch/sparc64/kernel/sun4v_tlb_miss.S
index c408b05..f622262 100644
--- a/arch/sparc64/kernel/sun4v_tlb_miss.S
+++ b/arch/sparc64/kernel/sun4v_tlb_miss.S
@@ -7,26 +7,20 @@
.align 32
sun4v_itlb_miss:
- /* Load CPU ID into %g3. */
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
+ /* Load MMU Miss base into %g2. */
+ ldxa [%g0] ASI_SCRATCHPAD, %g3
/* Load UTSB reg into %g1. */
- ldxa [%g1 + %g1] ASI_SCRATCHPAD, %g1
-
- /* Load &trap_block[smp_processor_id()] into %g2. */
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
+ mov SCRATCHPAD_UTSBREG1, %g1
+ ldxa [%g1] ASI_SCRATCHPAD, %g1
/* Create a TAG TARGET, "(vaddr>>22) | (ctx << 48)", in %g6.
* Branch if kernel TLB miss. The kernel TSB and user TSB miss
* code wants the missing virtual address in %g4, so that value
* cannot be modified through the entirety of this handler.
*/
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_CTX_OFFSET], %g5
+ ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5
srlx %g4, 22, %g3
sllx %g5, 48, %g6
or %g6, %g3, %g6
@@ -90,26 +84,20 @@
retry
sun4v_dtlb_miss:
- /* Load CPU ID into %g3. */
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
+ /* Load MMU Miss base into %g2. */
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
/* Load UTSB reg into %g1. */
+ mov SCRATCHPAD_UTSBREG1, %g1
ldxa [%g1 + %g1] ASI_SCRATCHPAD, %g1
- /* Load &trap_block[smp_processor_id()] into %g2. */
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
-
/* Create a TAG TARGET, "(vaddr>>22) | (ctx << 48)", in %g6.
* Branch if kernel TLB miss. The kernel TSB and user TSB miss
* code wants the missing virtual address in %g4, so that value
* cannot be modified through the entirety of this handler.
*/
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5
srlx %g4, 22, %g3
sllx %g5, 48, %g6
or %g6, %g3, %g6
@@ -169,17 +157,10 @@
retry
sun4v_dtlb_prot:
- /* Load CPU ID into %g3. */
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
+ /* Load MMU Miss base into %g2. */
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
- /* Load &trap_block[smp_processor_id()] into %g2. */
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
-
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g5
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g5
rdpr %tl, %g1
cmp %g1, 1
bgu,pn %xcc, winfix_trampoline
@@ -187,35 +168,17 @@
ba,pt %xcc, sparc64_realfault_common
mov FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4
- /* Called from trap table with &trap_block[smp_processor_id()] in
- * %g5 and SCRATCHPAD_UTSBREG1 contents in %g1.
+ /* Called from trap table with TAG TARGET placed into
+ * %g6 and SCRATCHPAD_UTSBREG1 contents in %g1.
*/
sun4v_itsb_miss:
- ldx [%g5 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_ADDR_OFFSET], %g4
- ldx [%g5 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_CTX_OFFSET], %g5
-
- srlx %g4, 22, %g7
- sllx %g5, 48, %g6
- or %g6, %g7, %g6
- brz,pn %g5, kvmap_itlb_4v
- nop
-
ba,pt %xcc, sun4v_tsb_miss_common
mov FAULT_CODE_ITLB, %g3
- /* Called from trap table with &trap_block[smp_processor_id()] in
- * %g5 and SCRATCHPAD_UTSBREG1 contents in %g1.
+ /* Called from trap table with TAG TARGET placed into
+ * %g6 and SCRATCHPAD_UTSBREG1 contents in %g1.
*/
sun4v_dtsb_miss:
- ldx [%g5 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g5 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
-
- srlx %g4, 22, %g7
- sllx %g5, 48, %g6
- or %g6, %g7, %g6
- brz,pn %g5, kvmap_dtlb_4v
- nop
-
mov FAULT_CODE_DTLB, %g3
/* Create TSB pointer into %g1. This is something like:
@@ -239,15 +202,10 @@
/* Instruction Access Exception, tl0. */
sun4v_iacc:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_TYPE_OFFSET], %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_CTX_OFFSET], %g5
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldx [%g2 + HV_FAULT_I_TYPE_OFFSET], %g3
+ ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
@@ -260,15 +218,10 @@
/* Instruction Access Exception, tl1. */
sun4v_iacc_tl1:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_TYPE_OFFSET], %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_I_CTX_OFFSET], %g5
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldx [%g2 + HV_FAULT_I_TYPE_OFFSET], %g3
+ ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etraptl1
@@ -281,15 +234,10 @@
/* Data Access Exception, tl0. */
sun4v_dacc:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
@@ -302,15 +250,10 @@
/* Data Access Exception, tl1. */
sun4v_dacc_tl1:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etraptl1
@@ -323,15 +266,10 @@
/* Memory Address Unaligned. */
sun4v_mna:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
mov HV_FAULT_TYPE_UNALIGNED, %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
@@ -359,15 +297,10 @@
/* Unaligned ldd float, tl0. */
sun4v_lddfmna:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
@@ -380,15 +313,10 @@
/* Unaligned std float, tl0. */
sun4v_stdfmna:
- mov SCRATCHPAD_CPUID, %g1
- ldxa [%g1] ASI_SCRATCHPAD, %g3
- sethi %hi(trap_block), %g2
- or %g2, %lo(trap_block), %g2
- sllx %g3, TRAP_BLOCK_SZ_SHIFT, %g3
- add %g2, %g3, %g2
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_TYPE_OFFSET], %g3
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_ADDR_OFFSET], %g4
- ldx [%g2 + TRAP_PER_CPU_FAULT_INFO + HV_FAULT_D_CTX_OFFSET], %g5
+ ldxa [%g0] ASI_SCRATCHPAD, %g2
+ ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3
+ ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4
+ ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5
sllx %g3, 16, %g3
or %g5, %g3, %g5
ba,pt %xcc, etrap
diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S
index c476f5b..8838220 100644
--- a/arch/sparc64/kernel/trampoline.S
+++ b/arch/sparc64/kernel/trampoline.S
@@ -389,10 +389,35 @@
or %o1, PSTATE_IE, %o1
wrpr %o1, 0, %pstate
- call prom_set_trap_table
+ sethi %hi(is_sun4v), %o0
+ lduw [%o0 + %lo(is_sun4v)], %o0
+ brz,pt %o0, 1f
+ nop
+
+ TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
+ add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
+ stxa %g2, [%g0] ASI_SCRATCHPAD
+
+ /* Compute physical address:
+ *
+ * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
+ */
+ sethi %hi(KERNBASE), %g3
+ sub %g2, %g3, %g2
+ sethi %hi(kern_base), %g3
+ ldx [%g3 + %lo(kern_base)], %g3
+ add %g2, %g3, %o1
+
+ call prom_set_trap_table_sun4v
sethi %hi(sparc64_ttable_tl0), %o0
- call smp_callin
+ ba,pt %xcc, 2f
+ nop
+
+1: call prom_set_trap_table
+ sethi %hi(sparc64_ttable_tl0), %o0
+
+2: call smp_callin
nop
call cpu_idle
mov 0, %o0