mirror of https://gitee.com/openkylin/linux.git
237 lines
5.5 KiB
ArmAsm
237 lines
5.5 KiB
ArmAsm
/*
|
|
* etrap.S: Preparing for entry into the kernel on Sparc V9.
|
|
*
|
|
* Copyright (C) 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1997, 1998, 1999 Jakub Jelinek (jj@ultra.linux.cz)
|
|
*/
|
|
|
|
|
|
#include <asm/asi.h>
|
|
#include <asm/pstate.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/page.h>
|
|
#include <asm/spitfire.h>
|
|
#include <asm/head.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/mmu.h>
|
|
|
|
#define TASK_REGOFF (THREAD_SIZE-TRACEREG_SZ-STACKFRAME_SZ)
|
|
#define ETRAP_PSTATE1 (PSTATE_RMO | PSTATE_PRIV)
|
|
#define ETRAP_PSTATE2 \
|
|
(PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV | PSTATE_IE)
|
|
|
|
/*
|
|
* On entry, %g7 is return address - 0x4.
|
|
* %g4 and %g5 will be preserved %l4 and %l5 respectively.
|
|
*/
|
|
|
|
.text
|
|
.align 64
|
|
.globl etrap_syscall, etrap, etrap_irq, etraptl1
|
|
etrap: rdpr %pil, %g2
|
|
etrap_irq: clr %g3
|
|
etrap_syscall: TRAP_LOAD_THREAD_REG(%g6, %g1)
|
|
rdpr %tstate, %g1
|
|
or %g1, %g3, %g1
|
|
sllx %g2, 20, %g3
|
|
andcc %g1, TSTATE_PRIV, %g0
|
|
or %g1, %g3, %g1
|
|
bne,pn %xcc, 1f
|
|
sub %sp, STACKFRAME_SZ+TRACEREG_SZ-STACK_BIAS, %g2
|
|
wrpr %g0, 7, %cleanwin
|
|
|
|
sethi %hi(TASK_REGOFF), %g2
|
|
sethi %hi(TSTATE_PEF), %g3
|
|
or %g2, %lo(TASK_REGOFF), %g2
|
|
and %g1, %g3, %g3
|
|
brnz,pn %g3, 1f
|
|
add %g6, %g2, %g2
|
|
wr %g0, 0, %fprs
|
|
1: rdpr %tpc, %g3
|
|
|
|
stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TSTATE]
|
|
rdpr %tnpc, %g1
|
|
stx %g3, [%g2 + STACKFRAME_SZ + PT_V9_TPC]
|
|
rd %y, %g3
|
|
stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TNPC]
|
|
rdpr %tt, %g1
|
|
st %g3, [%g2 + STACKFRAME_SZ + PT_V9_Y]
|
|
sethi %hi(PT_REGS_MAGIC), %g3
|
|
or %g3, %g1, %g1
|
|
st %g1, [%g2 + STACKFRAME_SZ + PT_V9_MAGIC]
|
|
|
|
rdpr %cansave, %g1
|
|
brnz,pt %g1, etrap_save
|
|
nop
|
|
|
|
rdpr %cwp, %g1
|
|
add %g1, 2, %g1
|
|
wrpr %g1, %cwp
|
|
be,pt %xcc, etrap_user_spill
|
|
mov ASI_AIUP, %g3
|
|
|
|
rdpr %otherwin, %g3
|
|
brz %g3, etrap_kernel_spill
|
|
mov ASI_AIUS, %g3
|
|
|
|
etrap_user_spill:
|
|
|
|
wr %g3, 0x0, %asi
|
|
ldx [%g6 + TI_FLAGS], %g3
|
|
and %g3, _TIF_32BIT, %g3
|
|
brnz,pt %g3, etrap_user_spill_32bit
|
|
nop
|
|
ba,a,pt %xcc, etrap_user_spill_64bit
|
|
|
|
etrap_save: save %g2, -STACK_BIAS, %sp
|
|
mov %g6, %l6
|
|
|
|
bne,pn %xcc, 3f
|
|
mov PRIMARY_CONTEXT, %l4
|
|
rdpr %canrestore, %g3
|
|
rdpr %wstate, %g2
|
|
wrpr %g0, 0, %canrestore
|
|
sll %g2, 3, %g2
|
|
mov 1, %l5
|
|
stb %l5, [%l6 + TI_FPDEPTH]
|
|
|
|
wrpr %g3, 0, %otherwin
|
|
wrpr %g2, 0, %wstate
|
|
sethi %hi(sparc64_kern_pri_context), %g2
|
|
ldx [%g2 + %lo(sparc64_kern_pri_context)], %g3
|
|
|
|
661: stxa %g3, [%l4] ASI_DMMU
|
|
.section .sun4v_1insn_patch, "ax"
|
|
.word 661b
|
|
stxa %g3, [%l4] ASI_MMU
|
|
.previous
|
|
|
|
sethi %hi(KERNBASE), %l4
|
|
flush %l4
|
|
mov ASI_AIUS, %l7
|
|
2: mov %g4, %l4
|
|
mov %g5, %l5
|
|
add %g7, 4, %l2
|
|
|
|
/* Go to trap time globals so we can save them. */
|
|
661: wrpr %g0, ETRAP_PSTATE1, %pstate
|
|
.section .sun4v_1insn_patch, "ax"
|
|
.word 661b
|
|
SET_GL(0)
|
|
.previous
|
|
|
|
stx %g1, [%sp + PTREGS_OFF + PT_V9_G1]
|
|
stx %g2, [%sp + PTREGS_OFF + PT_V9_G2]
|
|
sllx %l7, 24, %l7
|
|
stx %g3, [%sp + PTREGS_OFF + PT_V9_G3]
|
|
rdpr %cwp, %l0
|
|
stx %g4, [%sp + PTREGS_OFF + PT_V9_G4]
|
|
stx %g5, [%sp + PTREGS_OFF + PT_V9_G5]
|
|
stx %g6, [%sp + PTREGS_OFF + PT_V9_G6]
|
|
stx %g7, [%sp + PTREGS_OFF + PT_V9_G7]
|
|
or %l7, %l0, %l7
|
|
sethi %hi(TSTATE_RMO | TSTATE_PEF), %l0
|
|
or %l7, %l0, %l7
|
|
wrpr %l2, %tnpc
|
|
wrpr %l7, (TSTATE_PRIV | TSTATE_IE), %tstate
|
|
stx %i0, [%sp + PTREGS_OFF + PT_V9_I0]
|
|
stx %i1, [%sp + PTREGS_OFF + PT_V9_I1]
|
|
stx %i2, [%sp + PTREGS_OFF + PT_V9_I2]
|
|
stx %i3, [%sp + PTREGS_OFF + PT_V9_I3]
|
|
stx %i4, [%sp + PTREGS_OFF + PT_V9_I4]
|
|
stx %i5, [%sp + PTREGS_OFF + PT_V9_I5]
|
|
stx %i6, [%sp + PTREGS_OFF + PT_V9_I6]
|
|
mov %l6, %g6
|
|
stx %i7, [%sp + PTREGS_OFF + PT_V9_I7]
|
|
LOAD_PER_CPU_BASE(%g5, %g6, %g4, %g3, %l1)
|
|
ldx [%g6 + TI_TASK], %g4
|
|
done
|
|
|
|
3: mov ASI_P, %l7
|
|
ldub [%l6 + TI_FPDEPTH], %l5
|
|
add %l6, TI_FPSAVED + 1, %l4
|
|
srl %l5, 1, %l3
|
|
add %l5, 2, %l5
|
|
stb %l5, [%l6 + TI_FPDEPTH]
|
|
ba,pt %xcc, 2b
|
|
stb %g0, [%l4 + %l3]
|
|
nop
|
|
|
|
etraptl1: /* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself.
|
|
* We place this right after pt_regs on the trap stack.
|
|
* The layout is:
|
|
* 0x00 TL1's TSTATE
|
|
* 0x08 TL1's TPC
|
|
* 0x10 TL1's TNPC
|
|
* 0x18 TL1's TT
|
|
* ...
|
|
* 0x58 TL4's TT
|
|
* 0x60 TL
|
|
*/
|
|
TRAP_LOAD_THREAD_REG(%g6, %g1)
|
|
sub %sp, ((4 * 8) * 4) + 8, %g2
|
|
rdpr %tl, %g1
|
|
|
|
wrpr %g0, 1, %tl
|
|
rdpr %tstate, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x00]
|
|
rdpr %tpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x08]
|
|
rdpr %tnpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x10]
|
|
rdpr %tt, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x18]
|
|
|
|
wrpr %g0, 2, %tl
|
|
rdpr %tstate, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x20]
|
|
rdpr %tpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x28]
|
|
rdpr %tnpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x30]
|
|
rdpr %tt, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x38]
|
|
|
|
sethi %hi(is_sun4v), %g3
|
|
lduw [%g3 + %lo(is_sun4v)], %g3
|
|
brnz,pn %g3, finish_tl1_capture
|
|
nop
|
|
|
|
wrpr %g0, 3, %tl
|
|
rdpr %tstate, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x40]
|
|
rdpr %tpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x48]
|
|
rdpr %tnpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x50]
|
|
rdpr %tt, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x58]
|
|
|
|
wrpr %g0, 4, %tl
|
|
rdpr %tstate, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x60]
|
|
rdpr %tpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x68]
|
|
rdpr %tnpc, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x70]
|
|
rdpr %tt, %g3
|
|
stx %g3, [%g2 + STACK_BIAS + 0x78]
|
|
|
|
stx %g1, [%g2 + STACK_BIAS + 0x80]
|
|
|
|
finish_tl1_capture:
|
|
wrpr %g0, 1, %tl
|
|
661: nop
|
|
.section .sun4v_1insn_patch, "ax"
|
|
.word 661b
|
|
SET_GL(1)
|
|
.previous
|
|
|
|
rdpr %tstate, %g1
|
|
sub %g2, STACKFRAME_SZ + TRACEREG_SZ - STACK_BIAS, %g2
|
|
ba,pt %xcc, 1b
|
|
andcc %g1, TSTATE_PRIV, %g0
|
|
|
|
#undef TASK_REGOFF
|
|
#undef ETRAP_PSTATE1
|