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|
/*
* <vectors.S>
*
* Sparc V9 Trap Table(s) with SpitFire/Cheetah extensions.
*
* Copyright (C) 1996, 2001 David S. Miller (davem@caip.rutgers.edu)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*/
#define __ASSEMBLY__
#include "pstate.h"
#include <asm/asi.h>
#define ASI_BP ASI_PHYS_BYPASS_EC_E
#define PROM_ADDR 0x1fff0000000
#define SER_ADDR 0x1fe020003f8
#define TICK_INT_DIS 0x8000000000000000
#define TICK_INTERVAL 1*1000*1000
.section ".text.vectors", "ax"
.align 16384
/* Sparc64 trap table */
.globl trap_table, __divide_error, softint_irq, softint_irq_tl1
.register %g2, #scratch
.register %g3, #scratch
.register %g6, #scratch
.register %g7, #scratch
trap_table:
#define SPILL_WINDOW \
btst 1, %sp; \
be spill_32bit; \
nop; \
stx %l0, [%sp + STACK_BIAS + 0x00]; \
stx %l1, [%sp + STACK_BIAS + 0x08]; \
stx %l2, [%sp + STACK_BIAS + 0x10]; \
stx %l3, [%sp + STACK_BIAS + 0x18]; \
stx %l4, [%sp + STACK_BIAS + 0x20]; \
stx %l5, [%sp + STACK_BIAS + 0x28]; \
stx %l6, [%sp + STACK_BIAS + 0x30]; \
stx %l7, [%sp + STACK_BIAS + 0x38]; \
stx %i0, [%sp + STACK_BIAS + 0x40]; \
stx %i1, [%sp + STACK_BIAS + 0x48]; \
stx %i2, [%sp + STACK_BIAS + 0x50]; \
stx %i3, [%sp + STACK_BIAS + 0x58]; \
stx %i4, [%sp + STACK_BIAS + 0x60]; \
stx %i5, [%sp + STACK_BIAS + 0x68]; \
stx %i6, [%sp + STACK_BIAS + 0x70]; \
stx %i7, [%sp + STACK_BIAS + 0x78]; \
saved; retry; nop; nop; nop; nop; nop; nop; \
nop; nop; nop; nop; nop;
#define FILL_WINDOW \
btst 1, %sp; \
be fill_32bit; \
nop; \
ldx [%sp + STACK_BIAS + 0x00], %l0; \
ldx [%sp + STACK_BIAS + 0x08], %l1; \
ldx [%sp + STACK_BIAS + 0x10], %l2; \
ldx [%sp + STACK_BIAS + 0x18], %l3; \
ldx [%sp + STACK_BIAS + 0x20], %l4; \
ldx [%sp + STACK_BIAS + 0x28], %l5; \
ldx [%sp + STACK_BIAS + 0x30], %l6; \
ldx [%sp + STACK_BIAS + 0x38], %l7; \
ldx [%sp + STACK_BIAS + 0x40], %i0; \
ldx [%sp + STACK_BIAS + 0x48], %i1; \
ldx [%sp + STACK_BIAS + 0x50], %i2; \
ldx [%sp + STACK_BIAS + 0x58], %i3; \
ldx [%sp + STACK_BIAS + 0x60], %i4; \
ldx [%sp + STACK_BIAS + 0x68], %i5; \
ldx [%sp + STACK_BIAS + 0x70], %i6; \
ldx [%sp + STACK_BIAS + 0x78], %i7; \
restored; retry; nop; nop; nop; nop; nop; nop; \
nop; nop; nop; nop; nop;
#define CLEAN_WINDOW \
rdpr %cleanwin, %l0; add %l0, 1, %l0; \
wrpr %l0, 0x0, %cleanwin; \
clr %o0; clr %o1; clr %o2; clr %o3; \
clr %o4; clr %o5; clr %o6; clr %o7; \
clr %l0; clr %l1; clr %l2; clr %l3; \
clr %l4; clr %l5; clr %l6; clr %l7; \
retry; \
nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
#define TRAP_IRQ(routine, level) \
ba routine; mov level, %g1; nop; nop; nop; nop; nop; nop;
#define BTRAP(lvl) \
ba bug; mov lvl, %g1; nop; nop; nop; nop; nop; nop;
#define BTRAPTL1(lvl) BTRAP(lvl)
#define BTRAPS(x) BTRAP(x) BTRAP(x+1) BTRAP(x+2) BTRAP(x+3) BTRAP(x+4) BTRAP(x+5) BTRAP(x+6) BTRAP(x+7)
#define BTRAPS4(x) BTRAP(x) BTRAP(x+1) BTRAP(x+2) BTRAP(x+3)
#define TRAP_HANDLER(routine) ba routine; nop; nop; nop; nop; nop; nop; nop;
#define STACK_BIAS 2047
.globl sparc64_ttable_tl0, sparc64_ttable_tl1
sparc64_ttable_tl0:
ba entry; nop; nop; nop; nop; nop; nop; nop;! XXX remove
ba entry; nop; nop; nop; nop; nop; nop; nop;! Power-on reset
ba entry; nop; nop; nop; nop; nop; nop; nop;! Watchdog reset
ba entry; nop; nop; nop; nop; nop; nop; nop;! External reset
ba entry; nop; nop; nop; nop; nop; nop; nop;! Software reset
ba entry; nop; nop; nop; nop; nop; nop; nop;! RED state
BTRAP(0x06) BTRAP(0x07) BTRAPS(0x08)
BTRAPS(0x10) BTRAPS(0x18)
BTRAP(0x20) BTRAP(0x21) BTRAP(0x22) BTRAP(0x23)
CLEAN_WINDOW ! 24-27
BTRAPS(0x28)
BTRAPS(0x30) BTRAPS(0x38)
BTRAP(0x40) BTRAP(0x41) BTRAP(0x42) BTRAP(0x43)
tl0_irq4: TRAP_IRQ(handler_irq, 4)
tl0_irq5: TRAP_IRQ(handler_irq, 5) TRAP_IRQ(handler_irq, 6)
tl0_irq7: TRAP_IRQ(handler_irq, 7) TRAP_IRQ(handler_irq, 8)
tl0_irq9: TRAP_IRQ(handler_irq, 9) TRAP_IRQ(handler_irq, 10)
tl0_irq11: TRAP_IRQ(handler_irq, 11) TRAP_IRQ(handler_irq, 12)
tl0_irq13: TRAP_IRQ(handler_irq, 13)
tl0_irq14: TRAP_IRQ(softint_irq, 14)
tl0_irq15: TRAP_IRQ(handler_irq, 15)
BTRAPS(0x50) BTRAPS(0x58)
BTRAPS4(0x60)
TRAP_HANDLER(reload_IMMU_tlb) ! 0x64 : instruction_access_MMU_miss
TRAP_HANDLER(reload_IMMU_tlb) ! 0x65 : instruction_access_MMU_miss
TRAP_HANDLER(reload_IMMU_tlb) ! 0x66 : instruction_access_MMU_miss
TRAP_HANDLER(reload_IMMU_tlb) ! 0x67 : instruction_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x68 : data_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x69 : data_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x6A : data_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x6B : data_access_MMU_miss
BTRAPS4(0x6C) ! data_access_protection
BTRAPS(0x70) BTRAPS(0x78)
tl0_s0n: SPILL_WINDOW
tl0_s1n: SPILL_WINDOW
tl0_s2n: SPILL_WINDOW
tl0_s3n: SPILL_WINDOW
tl0_s4n: SPILL_WINDOW
tl0_s5n: SPILL_WINDOW
tl0_s6n: SPILL_WINDOW
tl0_s7n: SPILL_WINDOW
tl0_s0o: SPILL_WINDOW
tl0_s1o: SPILL_WINDOW
tl0_s2o: SPILL_WINDOW
tl0_s3o: SPILL_WINDOW
tl0_s4o: SPILL_WINDOW
tl0_s5o: SPILL_WINDOW
tl0_s6o: SPILL_WINDOW
tl0_s7o: SPILL_WINDOW
tl0_f0n: FILL_WINDOW
tl0_f1n: FILL_WINDOW
tl0_f2n: FILL_WINDOW
tl0_f3n: FILL_WINDOW
tl0_f4n: FILL_WINDOW
tl0_f5n: FILL_WINDOW
tl0_f6n: FILL_WINDOW
tl0_f7n: FILL_WINDOW
tl0_f0o: FILL_WINDOW
tl0_f1o: FILL_WINDOW
tl0_f2o: FILL_WINDOW
tl0_f3o: FILL_WINDOW
tl0_f4o: FILL_WINDOW
tl0_f5o: FILL_WINDOW
tl0_f6o: FILL_WINDOW
tl0_f7o: FILL_WINDOW
tl0_resv100: BTRAPS(0x100) BTRAPS(0x108)
tl0_resv110: BTRAPS(0x110) BTRAPS(0x118)
tl0_resv120: BTRAPS(0x120) BTRAPS(0x128)
tl0_resv130: BTRAPS(0x130) BTRAPS(0x138)
tl0_resv140: BTRAPS(0x140) BTRAPS(0x148)
tl0_resv150: BTRAPS(0x150) BTRAPS(0x158)
tl0_resv160: BTRAPS(0x160) BTRAPS(0x168)
tl0_resv170: BTRAPS(0x170) BTRAPS(0x178)
tl0_resv180: BTRAPS(0x180) BTRAPS(0x188)
tl0_resv190: BTRAPS(0x190) BTRAPS(0x198)
tl0_resv1a0: BTRAPS(0x1a0) BTRAPS(0x1a8)
tl0_resv1b0: BTRAPS(0x1b0) BTRAPS(0x1b8)
tl0_resv1c0: BTRAPS(0x1c0) BTRAPS(0x1c8)
tl0_resv1d0: BTRAPS(0x1d0) BTRAPS(0x1d8)
tl0_resv1e0: BTRAPS(0x1e0) BTRAPS(0x1e8)
tl0_resv1f0: BTRAPS(0x1f0) BTRAPS(0x1f8)
#undef BTRAPS
#define BTRAPS(x) BTRAPTL1(x) BTRAPTL1(x+1) BTRAPTL1(x+2) BTRAPTL1(x+3) BTRAPTL1(x+4) BTRAPTL1(x+5) BTRAPTL1(x+6) BTRAPTL1(x+7)
#define SKIP_IRQ(routine, level) \
retry; nop; nop; nop; nop; nop; nop; nop;
sparc64_ttable_tl1:
BTRAPS(0x00) BTRAPS(0x08)
BTRAPS(0x10) BTRAPS(0x18)
BTRAPTL1(0x20) BTRAPTL1(0x21) BTRAPTL1(0x22) BTRAPTL1(0x23)
CLEAN_WINDOW ! 24-27
BTRAPS(0x28)
BTRAPS(0x30) BTRAPS(0x38)
BTRAPTL1(0x40) BTRAPTL1(0x41) BTRAPTL1(0x42) BTRAPTL1(0x43)
tl1_irq4: TRAP_IRQ(handler_irq, 4)
tl1_irq5: TRAP_IRQ(handler_irq, 5) TRAP_IRQ(handler_irq, 6)
tl1_irq7: TRAP_IRQ(handler_irq, 7) TRAP_IRQ(handler_irq, 8)
tl1_irq9: TRAP_IRQ(handler_irq, 9) TRAP_IRQ(handler_irq, 10)
tl1_irq11: TRAP_IRQ(handler_irq, 11) TRAP_IRQ(handler_irq, 12)
tl1_irq13: TRAP_IRQ(handler_irq, 13)
tl1_irq14: SKIP_IRQ(softint_irq, 14)
tl1_irq15: TRAP_IRQ(handler_irq, 15)
BTRAPS(0x50) BTRAPS(0x58)
BTRAPS4(0x60)
TRAP_HANDLER(reload_IMMU_tlb) ! 0x64 : instruction_access_MMU_miss
TRAP_HANDLER(reload_IMMU_tlb) ! 0x65 : instruction_access_MMU_miss
TRAP_HANDLER(reload_IMMU_tlb) ! 0x66 : instruction_access_MMU_miss
TRAP_HANDLER(reload_IMMU_tlb) ! 0x67 : instruction_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x68 : data_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x69 : data_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x6A : data_access_MMU_miss
TRAP_HANDLER(reload_DMMU_tlb) ! 0x6B : data_access_MMU_miss
BTRAPS4(0x6C) ! data_access_protection
BTRAPS(0x70) BTRAPS(0x78)
tl1_s0n: SPILL_WINDOW
tl1_s1n: SPILL_WINDOW
tl1_s2n: SPILL_WINDOW
tl1_s3n: SPILL_WINDOW
tl1_s4n: SPILL_WINDOW
tl1_s5n: SPILL_WINDOW
tl1_s6n: SPILL_WINDOW
tl1_s7n: SPILL_WINDOW
tl1_s0o: SPILL_WINDOW
tl1_s1o: SPILL_WINDOW
tl1_s2o: SPILL_WINDOW
tl1_s3o: SPILL_WINDOW
tl1_s4o: SPILL_WINDOW
tl1_s5o: SPILL_WINDOW
tl1_s6o: SPILL_WINDOW
tl1_s7o: SPILL_WINDOW
tl1_f0n: FILL_WINDOW
tl1_f1n: FILL_WINDOW
tl1_f2n: FILL_WINDOW
tl1_f3n: FILL_WINDOW
tl1_f4n: FILL_WINDOW
tl1_f5n: FILL_WINDOW
tl1_f6n: FILL_WINDOW
tl1_f7n: FILL_WINDOW
tl1_f0o: FILL_WINDOW
tl1_f1o: FILL_WINDOW
tl1_f2o: FILL_WINDOW
tl1_f3o: FILL_WINDOW
tl1_f4o: FILL_WINDOW
tl1_f5o: FILL_WINDOW
tl1_f6o: FILL_WINDOW
tl1_f7o: FILL_WINDOW
tl1_resv100: BTRAPS(0x100) BTRAPS(0x108)
tl1_resv110: BTRAPS(0x110) BTRAPS(0x118)
tl1_resv120: BTRAPS(0x120) BTRAPS(0x128)
tl1_resv130: BTRAPS(0x130) BTRAPS(0x138)
tl1_resv140: BTRAPS(0x140) BTRAPS(0x148)
tl1_resv150: BTRAPS(0x150) BTRAPS(0x158)
tl1_resv160: BTRAPS(0x160) BTRAPS(0x168)
tl1_resv170: BTRAPS(0x170) BTRAPS(0x178)
tl1_resv180: BTRAPS(0x180) BTRAPS(0x188)
tl1_resv190: BTRAPS(0x190) BTRAPS(0x198)
tl1_resv1a0: BTRAPS(0x1a0) BTRAPS(0x1a8)
tl1_resv1b0: BTRAPS(0x1b0) BTRAPS(0x1b8)
tl1_resv1c0: BTRAPS(0x1c0) BTRAPS(0x1c8)
tl1_resv1d0: BTRAPS(0x1d0) BTRAPS(0x1d8)
tl1_resv1e0: BTRAPS(0x1e0) BTRAPS(0x1e8)
tl1_resv1f0: BTRAPS(0x1f0) BTRAPS(0x1f8)
.section ".data"
.align 8
.globl tlb_handler_stack_top, tlb_handler_stack_pointer, obp_ticks_pointer
! Stack for the tlb MMU trap handlers
tlb_handler_stack_bottom:
.skip 8192
tlb_handler_stack_top:
.skip 8
! MMU trap handler stack pointer
tlb_handler_stack_pointer:
.xword tlb_handler_stack_top
! Pointer to current tick value
obp_ticks_pointer:
.xword 0
.section ".text", "ax"
spill_32bit:
srl %sp, 0, %sp
stw %l0, [%sp + 0x00]
stw %l1, [%sp + 0x04]
stw %l2, [%sp + 0x08]
stw %l3, [%sp + 0x0c]
stw %l4, [%sp + 0x10]
stw %l5, [%sp + 0x14]
stw %l6, [%sp + 0x18]
stw %l7, [%sp + 0x1c]
stw %i0, [%sp + 0x20]
stw %i1, [%sp + 0x24]
stw %i2, [%sp + 0x28]
stw %i3, [%sp + 0x2c]
stw %i4, [%sp + 0x30]
stw %i5, [%sp + 0x34]
stw %i6, [%sp + 0x38]
stw %i7, [%sp + 0x3c]
saved
retry
fill_32bit:
srl %sp, 0, %sp
lduw [%sp + 0x00], %l0
lduw [%sp + 0x04], %l1
lduw [%sp + 0x08], %l2
lduw [%sp + 0x0c], %l3
lduw [%sp + 0x10], %l4
lduw [%sp + 0x14], %l5
lduw [%sp + 0x18], %l6
lduw [%sp + 0x1c], %l7
lduw [%sp + 0x20], %i0
lduw [%sp + 0x24], %i1
lduw [%sp + 0x28], %i2
lduw [%sp + 0x2c], %i3
lduw [%sp + 0x30], %i4
lduw [%sp + 0x34], %i5
lduw [%sp + 0x38], %i6
lduw [%sp + 0x3c], %i7
restored
retry
/*
* SAVE_CPU_STATE and RESTORE_CPU_STATE are macros used to enable a context switch
* to C to occur within the MMU I/D TLB miss handlers.
*
* Because these handlers are called on a TLB miss, we cannot use flushw to store
* processor window state on the stack, as the memory areas used by each window's
* stack pointer may not be in the TLB, causing recursive TLB miss traps.
*
* For this reason, we save window state by manually rotating the window registers
* and saving their contents (along with other vital registers) into a special
* tlb_handler_stack defined above which is guaranteed to be locked in the TLB, and
* so won't cause issues with trap recursion.
*
* Once this process is complete, we remain in a TL=0, CWP=0 state (with IE=1 to allow
* window fill/spill traps if required), switch to our safe tlb_handler_stack and
* invoke the miss handler.
*/
#define SAVE_CPU_STATE(type) \
/* Set up our exception stack pointer in %g1 */ \
setx tlb_handler_stack_pointer, %g7, %g6; \
ldx [%g6], %g1; \
add %g1, -0x510, %g1; \
\
/* First save the various state registers */ \
rdpr %cwp, %g7; \
stx %g7, [%g1]; \
rdpr %cansave, %g7; \
stx %g7, [%g1 + 0x8]; \
rdpr %canrestore, %g7; \
stx %g7, [%g1 + 0x10]; \
rdpr %otherwin, %g7; \
stx %g7, [%g1 + 0x18]; \
rdpr %wstate, %g7; \
stx %g7, [%g1 + 0x20]; \
rdpr %cleanwin, %g7; \
stx %g7, [%g1 + 0x28]; \
rdpr %pstate, %g7; \
stx %g7, [%g1 + 0x30]; \
\
rd %y, %g7; \
stx %g7, [%g1 + 0x38]; \
rd %fprs, %g7; \
stx %g7, [%g1 + 0x40]; \
\
rdpr %tl, %g7; \
stx %g7, [%g1 + 0x48]; \
\
/* Trap state */ \
add %g1, 0x50, %g5; \
mov 4, %g6; \
\
save_trap_state_##type: \
deccc %g6; \
wrpr %g6, %tl; \
rdpr %tpc, %g7; \
stx %g7, [%g5]; \
rdpr %tnpc, %g7; \
stx %g7, [%g5 + 0x8]; \
rdpr %tstate, %g7; \
stx %g7, [%g5 + 0x10]; \
rdpr %tt, %g7; \
stx %g7, [%g5 + 0x18]; \
bne save_trap_state_##type; \
add %g5, 0x20, %g5; \
\
/* For 4 trap levels with 4 registers, memory required is
4*8*4 = 0x80 bytes */ \
\
/* Save the o registers */ \
stx %o0, [%g1 + 0xd0]; \
stx %o1, [%g1 + 0xd8]; \
stx %o2, [%g1 + 0xe0]; \
stx %o3, [%g1 + 0xe8]; \
stx %o4, [%g1 + 0xf0]; \
stx %o5, [%g1 + 0xf8]; \
stx %o6, [%g1 + 0x100]; \
stx %o7, [%g1 + 0x108]; \
\
/* Now iterate through all of the windows saving all l and i registers */ \
add %g1, 0x110, %g5; \
\
/* Get the number of windows in %g6 */ \
rdpr %ver, %g6; \
and %g6, 0xf, %g6; \
inc %g6; \
\
save_cpu_window_##type: \
deccc %g6; \
wrpr %g6, %cwp; \
stx %l0, [%g5]; \
stx %l1, [%g5 + 0x8]; \
stx %l2, [%g5 + 0x10]; \
stx %l3, [%g5 + 0x18]; \
stx %l4, [%g5 + 0x20]; \
stx %l5, [%g5 + 0x28]; \
stx %l6, [%g5 + 0x30]; \
stx %l7, [%g5 + 0x38]; \
stx %i0, [%g5 + 0x40]; \
stx %i1, [%g5 + 0x48]; \
stx %i2, [%g5 + 0x50]; \
stx %i3, [%g5 + 0x58]; \
stx %i4, [%g5 + 0x60]; \
stx %i5, [%g5 + 0x68]; \
stx %i6, [%g5 + 0x70]; \
stx %i7, [%g5 + 0x78]; \
bne save_cpu_window_##type; \
add %g5, 0x80, %g5; \
\
/* For 8 windows with 16 registers to save in the window, memory required
is 16*8*8 = 0x400 bytes */ \
\
/* Now we should be in window 0 so update the other window registers */ \
rdpr %ver, %g6; \
and %g6, 0xf, %g6; \
dec %g6; \
wrpr %g6, %cansave; \
\
wrpr %g0, %cleanwin; \
wrpr %g0, %canrestore; \
wrpr %g0, %otherwin; \
\
/* Update our exception stack pointer */ \
setx tlb_handler_stack_pointer, %g7, %g6; \
stx %g1, [%g6];
#define RESTORE_CPU_STATE(type) \
/* Set up our exception stack pointer in %g1 */ \
setx tlb_handler_stack_pointer, %g7, %g6; \
ldx [%g6], %g1; \
\
/* Get the number of windows in %g6 */ \
rdpr %ver, %g6; \
and %g6, 0xf, %g6; \
inc %g6; \
\
/* Now iterate through all of the windows restoring all l and i registers */ \
add %g1, 0x110, %g5; \
\
restore_cpu_window_##type: \
deccc %g6; \
wrpr %g6, %cwp; \
ldx [%g5], %l0; \
ldx [%g5 + 0x8], %l1; \
ldx [%g5 + 0x10], %l2; \
ldx [%g5 + 0x18], %l3; \
ldx [%g5 + 0x20], %l4; \
ldx [%g5 + 0x28], %l5; \
ldx [%g5 + 0x30], %l6; \
ldx [%g5 + 0x38], %l7; \
ldx [%g5 + 0x40], %i0; \
ldx [%g5 + 0x48], %i1; \
ldx [%g5 + 0x50], %i2; \
ldx [%g5 + 0x58], %i3; \
ldx [%g5 + 0x60], %i4; \
ldx [%g5 + 0x68], %i5; \
ldx [%g5 + 0x70], %i6; \
ldx [%g5 + 0x78], %i7; \
bne restore_cpu_window_##type; \
add %g5, 0x80, %g5; \
\
/* Restore the window registers to their original value */ \
ldx [%g1], %g7; \
wrpr %g7, %cwp; \
ldx [%g1 + 0x8], %g7; \
wrpr %g7, %cansave; \
ldx [%g1 + 0x10], %g7; \
wrpr %g7, %canrestore; \
ldx [%g1 + 0x18], %g7; \
wrpr %g7, %otherwin; \
ldx [%g1 + 0x20], %g7; \
wrpr %g7, %wstate; \
ldx [%g1 + 0x28], %g7; \
wrpr %g7, %cleanwin; \
ldx [%g1 + 0x30], %g7; \
wrpr %g7, %pstate; \
\
/* Restore the o registers */ \
ldx [%g1 + 0xd0], %o0; \
ldx [%g1 + 0xd8], %o1; \
ldx [%g1 + 0xe0], %o2; \
ldx [%g1 + 0xe8], %o3; \
ldx [%g1 + 0xf0], %o4; \
ldx [%g1 + 0xf8], %o5; \
ldx [%g1 + 0x100], %o6; \
ldx [%g1 + 0x108], %o7; \
\
/* Restore the trap state */ \
add %g1, 0x50, %g5; \
mov 4, %g6; \
\
restore_trap_state_##type: \
deccc %g6; \
wrpr %g6, %tl; \
ldx [%g5], %g7; \
wrpr %g7, %tpc; \
ldx [%g5 + 0x8], %g7; \
wrpr %g7, %tnpc; \
ldx [%g5 + 0x10], %g7; \
wrpr %g7, %tstate; \
ldx [%g5 + 0x18], %g7; \
wrpr %g7, %tt; \
bne restore_trap_state_##type; \
add %g5, 0x20, %g5; \
\
ldx [%g1 + 0x38], %g7; \
wr %g7, 0, %y; \
ldx [%g1 + 0x40], %g7; \
wr %g7, 0, %fprs; \
ldx [%g1 + 0x48], %g7; \
wrpr %g7, %tl; \
\
/* Restore exception stack pointer to previous value */ \
setx tlb_handler_stack_pointer, %g7, %g6; \
add %g1, 0x510, %g1; \
stx %g1, [%g6];
.globl reload_DMMU_tlb, reload_IMMU_tlb, bug
reload_DMMU_tlb:
SAVE_CPU_STATE(dtlb)
/* Switch to TLB locked stack space (note we add an additional 192 bytes required for
gcc to save its arguments when building with -O0) */
add %g1, -STACK_BIAS - 192, %sp
/* Enable interrupts for window spill/fill traps */
rdpr %pstate, %g7
or %g7, PSTATE_IE, %g7
wrpr %g7, %pstate
call dtlb_miss_handler
nop
/* Disable interrupts */
rdpr %pstate, %g7
andn %g7, PSTATE_IE, %g7
wrpr %g7, %pstate
RESTORE_CPU_STATE(dtlb)
retry
reload_IMMU_tlb:
SAVE_CPU_STATE(itlb)
/* Switch to TLB locked stack space (note we add an additional 192 bytes required for
gcc to save its arguments when building with -O0) */
add %g1, -STACK_BIAS - 192, %sp
/* Enable interrupts for window spill/fill traps */
rdpr %pstate, %g7
or %g7, PSTATE_IE, %g7
wrpr %g7, %pstate
call itlb_miss_handler
nop
/* Disable interrupts */
rdpr %pstate, %g7
andn %g7, PSTATE_IE, %g7
wrpr %g7, %pstate
RESTORE_CPU_STATE(itlb)
retry
softint_irq_tl1:
softint_irq:
mov 1, %g2
/* clear tick interrupt */
wr %g2, 0x0, %clear_softint
sll %g2, %g1, %g2
sra %g2, 0, %g2
/* clear softint interrupt */
wr %g2, 0x0, %clear_softint
setx TICK_INT_DIS, %g2, %g1
rd %tick, %g2
and %g1, %g2, %g1
brnz,pn %g1, tick_compare_disabled
nop
/* update tick value if pointer set */
setx obp_ticks_pointer, %g3, %g1
ldx [%g1], %g3
brz %g3, tick_rearm
nop
ldx [%g3], %g1
add %g1, 10, %g1 ! 100Hz = 10ms
stx %g1, [%g3]
tick_rearm:
set TICK_INTERVAL, %g1
add %g1, %g2, %g1
wr %g1, 0, %tick_cmpr
tick_compare_disabled:
retry
handler_irq:
__divide_error:
bug:
/* Dump the exception and its context */
! Set up CPU state
! Don't change the global register set or we lose %g1 (exception level)
rdpr %pstate, %g2
or %g2, PSTATE_PRIV, %g2
wrpr %g2, %pstate
wr %g0, 0, %fprs
! Jump to ROM ...
setx _start, %g2, %g3
setx highmem, %g2, %g4
sub %g4, %g3, %g4
setx PROM_ADDR, %g2, %g3
add %g4, %g3, %g3
jmp %g3
! ... while disabling I/D MMUs and caches
stxa %g0, [%g0] ASI_LSU_CONTROL
highmem:
! Extract NWINDOWS from %ver
rdpr %ver, %g2
and %g2, 0xf, %g2
wrpr %g2, 0, %cleanwin
wrpr %g2, 0, %cansave
wrpr %g0, 0, %canrestore
wrpr %g0, 0, %otherwin
wrpr %g0, 0, %wstate
b dump_exception
nop
outstr:
/* void outstr (unsigned long port, const unsigned char *str);
* Writes a string on an IO port.
*/
1: ldub [%o1], %o3
cmp %o3, 0
be 2f
nop
stba %o3, [%o0] ASI_BP
b 1b
inc %o1
2: retl
nop
outdigit:
/* void outdigit (unsigned long port, uint8_t digit);
* Dumps a single digit on serial port.
*/
add %o1, '0', %o1
retl
stba %o1, [%o0] ASI_BP
outhex:
/* void outhex (unsigned long port, uint64_t value);
* Dumps a 64 bits hex number on serial port
*/
mov %o1, %o2
set 60, %o3
srlx %o2, %o3, %o1
1: and %o1, 0xf, %o1
cmp %o1, 9
bgt 2f
nop
b 3f
add %o1, '0', %o1
2: add %o1, 'a' - 10, %o1
3: stba %o1, [%o0] ASI_BP
subcc %o3, 4, %o3
bge 1b
srlx %o2, %o3, %o1
retl
nop
/* void dump_exception ();
*
* Dump a message when catching an exception
*/
dump_exception:
setx SER_ADDR, %o3, %o0
set _start, %g3
set (_BUG_message_0), %o1
sub %o1, %g3, %g4
setx PROM_ADDR, %g2, %g3
add %g4, %g3, %g3
call outstr
mov %g3, %o1
call outhex
mov %g1, %o1
call outstr
add %g3, (_BUG_message_1 - _BUG_message_0), %o1
call outhex
rdpr %tpc, %o1
call outstr
add %g3, (_BUG_message_2 - _BUG_message_0), %o1
call outhex
rdpr %tnpc, %o1
call outstr
add %g3, (_BUG_message_3 - _BUG_message_0), %o1
_forever:
/* Loop forever */
b _forever ;
nop
.section .rodata
_BUG_message_0:
.string "Unhandled Exception 0x"
_BUG_message_1:
.string "\nPC = 0x"
_BUG_message_2:
.string " NPC = 0x"
_BUG_message_3:
.string "\nStopping execution\n"
|
