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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 23:05:57 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 23:05:57 +1030 |
| commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
| tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/sparc/kernel/ivec.S | |
| parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
| parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/sparc/kernel/ivec.S')
| -rw-r--r-- | arch/sparc/kernel/ivec.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/sparc/kernel/ivec.S b/arch/sparc/kernel/ivec.S new file mode 100644 index 00000000000..d29f92ebca5 --- /dev/null +++ b/arch/sparc/kernel/ivec.S @@ -0,0 +1,51 @@ + /* The registers for cross calls will be: + * + * DATA 0: [low 32-bits] Address of function to call, jmp to this + * [high 32-bits] MMU Context Argument 0, place in %g5 + * DATA 1: Address Argument 1, place in %g1 + * DATA 2: Address Argument 2, place in %g7 + * + * With this method we can do most of the cross-call tlb/cache + * flushing very quickly. + */ + .align 32 + .globl do_ivec + .type do_ivec,#function +do_ivec: + mov 0x40, %g3 + ldxa [%g3 + %g0] ASI_INTR_R, %g3 + sethi %hi(KERNBASE), %g4 + cmp %g3, %g4 + bgeu,pn %xcc, do_ivec_xcall + srlx %g3, 32, %g5 + stxa %g0, [%g0] ASI_INTR_RECEIVE + membar #Sync + + sethi %hi(ivector_table_pa), %g2 + ldx [%g2 + %lo(ivector_table_pa)], %g2 + sllx %g3, 4, %g3 + add %g2, %g3, %g3 + + TRAP_LOAD_IRQ_WORK_PA(%g6, %g1) + + ldx [%g6], %g5 + stxa %g5, [%g3] ASI_PHYS_USE_EC + stx %g3, [%g6] + wr %g0, 1 << PIL_DEVICE_IRQ, %set_softint + retry +do_ivec_xcall: + mov 0x50, %g1 + ldxa [%g1 + %g0] ASI_INTR_R, %g1 + srl %g3, 0, %g3 + + mov 0x60, %g7 + ldxa [%g7 + %g0] ASI_INTR_R, %g7 + stxa %g0, [%g0] ASI_INTR_RECEIVE + membar #Sync + ba,pt %xcc, 1f + nop + + .align 32 +1: jmpl %g3, %g0 + nop + .size do_ivec,.-do_ivec |