[SPARC64]: Detect sun4v early in boot process.
We look for "SUNW,sun4v" in the 'compatible' property of the root OBP device tree node. Protect every %ver register access, to make sure it is not touched on sun4v, as %ver is hyperprivileged there. Lock kernel TLB entries using hypervisor calls instead of calls into OBP. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
@@ -95,12 +95,17 @@ sparc64_boot:
|
||||
wrpr %g1, 0x0, %pstate
|
||||
ba,a,pt %xcc, 1f
|
||||
|
||||
.globl prom_finddev_name, prom_chosen_path
|
||||
.globl prom_getprop_name, prom_mmu_name
|
||||
.globl prom_callmethod_name, prom_translate_name
|
||||
.globl prom_finddev_name, prom_chosen_path, prom_root_node
|
||||
.globl prom_getprop_name, prom_mmu_name, prom_peer_name
|
||||
.globl prom_callmethod_name, prom_translate_name, prom_root_compatible
|
||||
.globl prom_map_name, prom_unmap_name, prom_mmu_ihandle_cache
|
||||
.globl prom_boot_mapped_pc, prom_boot_mapping_mode
|
||||
.globl prom_boot_mapping_phys_high, prom_boot_mapping_phys_low
|
||||
.globl is_sun4v
|
||||
prom_peer_name:
|
||||
.asciz "peer"
|
||||
prom_compatible_name:
|
||||
.asciz "compatible"
|
||||
prom_finddev_name:
|
||||
.asciz "finddevice"
|
||||
prom_chosen_path:
|
||||
@@ -117,7 +122,13 @@ prom_map_name:
|
||||
.asciz "map"
|
||||
prom_unmap_name:
|
||||
.asciz "unmap"
|
||||
prom_sun4v_name:
|
||||
.asciz "SUNW,sun4v"
|
||||
.align 4
|
||||
prom_root_compatible:
|
||||
.skip 64
|
||||
prom_root_node:
|
||||
.word 0
|
||||
prom_mmu_ihandle_cache:
|
||||
.word 0
|
||||
prom_boot_mapped_pc:
|
||||
@@ -129,8 +140,54 @@ prom_boot_mapping_phys_high:
|
||||
.xword 0
|
||||
prom_boot_mapping_phys_low:
|
||||
.xword 0
|
||||
is_sun4v:
|
||||
.word 0
|
||||
1:
|
||||
rd %pc, %l0
|
||||
|
||||
mov (1b - prom_peer_name), %l1
|
||||
sub %l0, %l1, %l1
|
||||
mov 0, %l2
|
||||
|
||||
/* prom_root_node = prom_peer(0) */
|
||||
stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "peer"
|
||||
mov 1, %l3
|
||||
stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1
|
||||
stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
|
||||
stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, 0
|
||||
stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1
|
||||
call %l7
|
||||
add %sp, (2047 + 128), %o0 ! argument array
|
||||
|
||||
ldx [%sp + 2047 + 128 + 0x20], %l4 ! prom root node
|
||||
mov (1b - prom_root_node), %l1
|
||||
sub %l0, %l1, %l1
|
||||
stw %l4, [%l1]
|
||||
|
||||
mov (1b - prom_getprop_name), %l1
|
||||
mov (1b - prom_compatible_name), %l2
|
||||
mov (1b - prom_root_compatible), %l5
|
||||
sub %l0, %l1, %l1
|
||||
sub %l0, %l2, %l2
|
||||
sub %l0, %l5, %l5
|
||||
|
||||
/* prom_getproperty(prom_root_node, "compatible",
|
||||
* &prom_root_compatible, 64)
|
||||
*/
|
||||
stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop"
|
||||
mov 4, %l3
|
||||
stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4
|
||||
mov 1, %l3
|
||||
stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
|
||||
stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, prom_root_node
|
||||
stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible"
|
||||
stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_root_compatible
|
||||
mov 64, %l3
|
||||
stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size
|
||||
stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1
|
||||
call %l7
|
||||
add %sp, (2047 + 128), %o0 ! argument array
|
||||
|
||||
mov (1b - prom_finddev_name), %l1
|
||||
mov (1b - prom_chosen_path), %l2
|
||||
mov (1b - prom_boot_mapped_pc), %l3
|
||||
@@ -239,6 +296,27 @@ prom_boot_mapping_phys_low:
|
||||
add %sp, (192 + 128), %sp
|
||||
|
||||
sparc64_boot_after_remap:
|
||||
sethi %hi(prom_root_compatible), %g1
|
||||
or %g1, %lo(prom_root_compatible), %g1
|
||||
sethi %hi(prom_sun4v_name), %g7
|
||||
or %g7, %lo(prom_sun4v_name), %g7
|
||||
mov 10, %g3
|
||||
1: ldub [%g7], %g2
|
||||
ldub [%g1], %g4
|
||||
cmp %g2, %g4
|
||||
bne,pn %icc, 2f
|
||||
add %g7, 1, %g7
|
||||
subcc %g3, 1, %g3
|
||||
bne,pt %xcc, 1b
|
||||
add %g1, 1, %g1
|
||||
|
||||
sethi %hi(is_sun4v), %g1
|
||||
or %g1, %lo(is_sun4v), %g1
|
||||
mov 1, %g7
|
||||
stw %g7, [%g1]
|
||||
|
||||
2:
|
||||
BRANCH_IF_SUN4V(g1, jump_to_sun4u_init)
|
||||
BRANCH_IF_CHEETAH_BASE(g1,g7,cheetah_boot)
|
||||
BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,cheetah_plus_boot)
|
||||
ba,pt %xcc, spitfire_boot
|
||||
@@ -323,14 +401,12 @@ sun4u_init:
|
||||
|
||||
membar #Sync
|
||||
|
||||
BRANCH_IF_ANY_CHEETAH(g1,g7,cheetah_tlb_fixup)
|
||||
BRANCH_IF_SUN4V(g1, niagara_tlb_fixup)
|
||||
BRANCH_IF_ANY_CHEETAH(g1, g7, cheetah_tlb_fixup)
|
||||
|
||||
ba,pt %xcc, spitfire_tlb_fixup
|
||||
nop
|
||||
|
||||
/* XXX Nothing branches to here yet, when %ver register indicates
|
||||
* XXX Niagara we should do this.
|
||||
*/
|
||||
niagara_tlb_fixup:
|
||||
mov 3, %g2 /* Set TLB type to hypervisor. */
|
||||
sethi %hi(tlb_type), %g1
|
||||
@@ -346,6 +422,9 @@ niagara_tlb_fixup:
|
||||
call hypervisor_patch_cachetlbops
|
||||
nop
|
||||
|
||||
ba,pt %xcc, tlb_fixup_done
|
||||
nop
|
||||
|
||||
cheetah_tlb_fixup:
|
||||
mov 2, %g2 /* Set TLB type to cheetah+. */
|
||||
BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,1f)
|
||||
@@ -464,7 +543,8 @@ setup_trap_table:
|
||||
sllx %o2, 32, %o2
|
||||
wr %o2, 0, %tick_cmpr
|
||||
|
||||
BRANCH_IF_ANY_CHEETAH(o2,o3,1f)
|
||||
BRANCH_IF_SUN4V(o2, 1f)
|
||||
BRANCH_IF_ANY_CHEETAH(o2, o3, 1f)
|
||||
|
||||
ba,pt %xcc, 2f
|
||||
nop
|
||||
|
Reference in New Issue
Block a user