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-rw-r--r--arch/xtensa/kernel/align.S38
-rw-r--r--arch/xtensa/kernel/coprocessor.S20
-rw-r--r--arch/xtensa/kernel/entry.S311
-rw-r--r--arch/xtensa/kernel/head.S36
-rw-r--r--arch/xtensa/kernel/irq.c6
-rw-r--r--arch/xtensa/kernel/process.c147
-rw-r--r--arch/xtensa/kernel/setup.c4
-rw-r--r--arch/xtensa/kernel/syscall.c8
-rw-r--r--arch/xtensa/kernel/traps.c22
-rw-r--r--arch/xtensa/kernel/vectors.S44
-rw-r--r--arch/xtensa/kernel/xtensa_ksyms.c1
11 files changed, 318 insertions, 319 deletions
diff --git a/arch/xtensa/kernel/align.S b/arch/xtensa/kernel/align.S
index 33d6e9d2e83..934ae58e2c7 100644
--- a/arch/xtensa/kernel/align.S
+++ b/arch/xtensa/kernel/align.S
@@ -170,15 +170,15 @@ ENTRY(fast_unaligned)
s32i a7, a2, PT_AREG7
s32i a8, a2, PT_AREG8
- rsr a0, DEPC
- xsr a3, EXCSAVE_1
+ rsr a0, depc
+ xsr a3, excsave1
s32i a0, a2, PT_AREG2
s32i a3, a2, PT_AREG3
/* Keep value of SAR in a0 */
- rsr a0, SAR
- rsr a8, EXCVADDR # load unaligned memory address
+ rsr a0, sar
+ rsr a8, excvaddr # load unaligned memory address
/* Now, identify one of the following load/store instructions.
*
@@ -197,7 +197,7 @@ ENTRY(fast_unaligned)
/* Extract the instruction that caused the unaligned access. */
- rsr a7, EPC_1 # load exception address
+ rsr a7, epc1 # load exception address
movi a3, ~3
and a3, a3, a7 # mask lower bits
@@ -275,16 +275,16 @@ ENTRY(fast_unaligned)
1:
#if XCHAL_HAVE_LOOPS
- rsr a5, LEND # check if we reached LEND
+ rsr a5, lend # check if we reached LEND
bne a7, a5, 1f
- rsr a5, LCOUNT # and LCOUNT != 0
+ rsr a5, lcount # and LCOUNT != 0
beqz a5, 1f
addi a5, a5, -1 # decrement LCOUNT and set
- rsr a7, LBEG # set PC to LBEGIN
- wsr a5, LCOUNT
+ rsr a7, lbeg # set PC to LBEGIN
+ wsr a5, lcount
#endif
-1: wsr a7, EPC_1 # skip load instruction
+1: wsr a7, epc1 # skip load instruction
extui a4, a4, INSN_T, 4 # extract target register
movi a5, .Lload_table
addx8 a4, a4, a5
@@ -355,16 +355,16 @@ ENTRY(fast_unaligned)
1:
#if XCHAL_HAVE_LOOPS
- rsr a4, LEND # check if we reached LEND
+ rsr a4, lend # check if we reached LEND
bne a7, a4, 1f
- rsr a4, LCOUNT # and LCOUNT != 0
+ rsr a4, lcount # and LCOUNT != 0
beqz a4, 1f
addi a4, a4, -1 # decrement LCOUNT and set
- rsr a7, LBEG # set PC to LBEGIN
- wsr a4, LCOUNT
+ rsr a7, lbeg # set PC to LBEGIN
+ wsr a4, lcount
#endif
-1: wsr a7, EPC_1 # skip store instruction
+1: wsr a7, epc1 # skip store instruction
movi a4, ~3
and a4, a4, a8 # align memory address
@@ -406,7 +406,7 @@ ENTRY(fast_unaligned)
.Lexit:
movi a4, 0
- rsr a3, EXCSAVE_1
+ rsr a3, excsave1
s32i a4, a3, EXC_TABLE_FIXUP
/* Restore working register */
@@ -420,7 +420,7 @@ ENTRY(fast_unaligned)
/* restore SAR and return */
- wsr a0, SAR
+ wsr a0, sar
l32i a0, a2, PT_AREG0
l32i a2, a2, PT_AREG2
rfe
@@ -438,10 +438,10 @@ ENTRY(fast_unaligned)
l32i a6, a2, PT_AREG6
l32i a5, a2, PT_AREG5
l32i a4, a2, PT_AREG4
- wsr a0, SAR
+ wsr a0, sar
mov a1, a2
- rsr a0, PS
+ rsr a0, ps
bbsi.l a2, PS_UM_BIT, 1f # jump if user mode
movi a0, _kernel_exception
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
index 2bc1e145c0a..54c3be313bf 100644
--- a/arch/xtensa/kernel/coprocessor.S
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -43,7 +43,7 @@
/* IO protection is currently unsupported. */
ENTRY(fast_io_protect)
- wsr a0, EXCSAVE_1
+ wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
@@ -220,7 +220,7 @@ ENTRY(coprocessor_restore)
*/
ENTRY(fast_coprocessor_double)
- wsr a0, EXCSAVE_1
+ wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
@@ -229,13 +229,13 @@ ENTRY(fast_coprocessor)
/* Save remaining registers a1-a3 and SAR */
- xsr a3, EXCSAVE_1
+ xsr a3, excsave1
s32i a3, a2, PT_AREG3
- rsr a3, SAR
+ rsr a3, sar
s32i a1, a2, PT_AREG1
s32i a3, a2, PT_SAR
mov a1, a2
- rsr a2, DEPC
+ rsr a2, depc
s32i a2, a1, PT_AREG2
/*
@@ -248,17 +248,17 @@ ENTRY(fast_coprocessor)
/* Find coprocessor number. Subtract first CP EXCCAUSE from EXCCAUSE */
- rsr a3, EXCCAUSE
+ rsr a3, exccause
addi a3, a3, -EXCCAUSE_COPROCESSOR0_DISABLED
/* Set corresponding CPENABLE bit -> (sar:cp-index, a3: 1<<cp-index)*/
ssl a3 # SAR: 32 - coprocessor_number
movi a2, 1
- rsr a0, CPENABLE
+ rsr a0, cpenable
sll a2, a2
or a0, a0, a2
- wsr a0, CPENABLE
+ wsr a0, cpenable
rsync
/* Retrieve previous owner. (a3 still holds CP number) */
@@ -291,7 +291,7 @@ ENTRY(fast_coprocessor)
/* Note that only a0 and a1 were preserved. */
-2: rsr a3, EXCCAUSE
+2: rsr a3, exccause
addi a3, a3, -EXCCAUSE_COPROCESSOR0_DISABLED
movi a0, coprocessor_owner
addx4 a0, a3, a0
@@ -321,7 +321,7 @@ ENTRY(fast_coprocessor)
l32i a0, a1, PT_SAR
l32i a3, a1, PT_AREG3
l32i a2, a1, PT_AREG2
- wsr a0, SAR
+ wsr a0, sar
l32i a0, a1, PT_AREG0
l32i a1, a1, PT_AREG1
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 7e623607339..90bfc1dbc13 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -112,8 +112,8 @@ ENTRY(user_exception)
/* Save a2, a3, and depc, restore excsave_1 and set SP. */
- xsr a3, EXCSAVE_1
- rsr a0, DEPC
+ xsr a3, excsave1
+ rsr a0, depc
s32i a1, a2, PT_AREG1
s32i a0, a2, PT_AREG2
s32i a3, a2, PT_AREG3
@@ -125,16 +125,16 @@ _user_exception:
/* Save SAR and turn off single stepping */
movi a2, 0
- rsr a3, SAR
- xsr a2, ICOUNTLEVEL
+ rsr a3, sar
+ xsr a2, icountlevel
s32i a3, a1, PT_SAR
s32i a2, a1, PT_ICOUNTLEVEL
/* Rotate ws so that the current windowbase is at bit0. */
/* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
- rsr a2, WINDOWBASE
- rsr a3, WINDOWSTART
+ rsr a2, windowbase
+ rsr a3, windowstart
ssr a2
s32i a2, a1, PT_WINDOWBASE
s32i a3, a1, PT_WINDOWSTART
@@ -205,12 +205,12 @@ _user_exception:
/* WINDOWBASE still in SAR! */
- rsr a2, SAR # original WINDOWBASE
+ rsr a2, sar # original WINDOWBASE
movi a3, 1
ssl a2
sll a3, a3
- wsr a3, WINDOWSTART # set corresponding WINDOWSTART bit
- wsr a2, WINDOWBASE # and WINDOWSTART
+ wsr a3, windowstart # set corresponding WINDOWSTART bit
+ wsr a2, windowbase # and WINDOWSTART
rsync
/* We are back to the original stack pointer (a1) */
@@ -252,8 +252,8 @@ ENTRY(kernel_exception)
/* Save a0, a2, a3, DEPC and set SP. */
- xsr a3, EXCSAVE_1 # restore a3, excsave_1
- rsr a0, DEPC # get a2
+ xsr a3, excsave1 # restore a3, excsave_1
+ rsr a0, depc # get a2
s32i a1, a2, PT_AREG1
s32i a0, a2, PT_AREG2
s32i a3, a2, PT_AREG3
@@ -265,16 +265,16 @@ _kernel_exception:
/* Save SAR and turn off single stepping */
movi a2, 0
- rsr a3, SAR
- xsr a2, ICOUNTLEVEL
+ rsr a3, sar
+ xsr a2, icountlevel
s32i a3, a1, PT_SAR
s32i a2, a1, PT_ICOUNTLEVEL
/* Rotate ws so that the current windowbase is at bit0. */
/* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
- rsr a2, WINDOWBASE # don't need to save these, we only
- rsr a3, WINDOWSTART # need shifted windowstart: windowmask
+ rsr a2, windowbase # don't need to save these, we only
+ rsr a3, windowstart # need shifted windowstart: windowmask
ssr a2
slli a2, a3, 32-WSBITS
src a2, a3, a2
@@ -323,24 +323,24 @@ common_exception:
/* Save some registers, disable loops and clear the syscall flag. */
- rsr a2, DEBUGCAUSE
- rsr a3, EPC_1
+ rsr a2, debugcause
+ rsr a3, epc1
s32i a2, a1, PT_DEBUGCAUSE
s32i a3, a1, PT_PC
movi a2, -1
- rsr a3, EXCVADDR
+ rsr a3, excvaddr
s32i a2, a1, PT_SYSCALL
movi a2, 0
s32i a3, a1, PT_EXCVADDR
- xsr a2, LCOUNT
+ xsr a2, lcount
s32i a2, a1, PT_LCOUNT
/* It is now save to restore the EXC_TABLE_FIXUP variable. */
- rsr a0, EXCCAUSE
+ rsr a0, exccause
movi a3, 0
- rsr a2, EXCSAVE_1
+ rsr a2, excsave1
s32i a0, a1, PT_EXCCAUSE
s32i a3, a2, EXC_TABLE_FIXUP
@@ -352,22 +352,22 @@ common_exception:
* (interrupts disabled) and if this exception is not an interrupt.
*/
- rsr a3, PS
+ rsr a3, ps
addi a0, a0, -4
movi a2, 1
extui a3, a3, 0, 1 # a3 = PS.INTLEVEL[0]
moveqz a3, a2, a0 # a3 = 1 iff interrupt exception
movi a2, 1 << PS_WOE_BIT
or a3, a3, a2
- rsr a0, EXCCAUSE
- xsr a3, PS
+ rsr a0, exccause
+ xsr a3, ps
s32i a3, a1, PT_PS # save ps
- /* Save LBEG, LEND */
+ /* Save lbeg, lend */
- rsr a2, LBEG
- rsr a3, LEND
+ rsr a2, lbeg
+ rsr a3, lend
s32i a2, a1, PT_LBEG
s32i a3, a1, PT_LEND
@@ -432,7 +432,7 @@ common_exception_return:
load_xtregs_opt a1 a2 a4 a5 a6 a7 PT_XTREGS_OPT
- wsr a3, PS /* disable interrupts */
+ wsr a3, ps /* disable interrupts */
_bbci.l a3, PS_UM_BIT, kernel_exception_exit
@@ -444,12 +444,12 @@ user_exception_exit:
l32i a2, a1, PT_WINDOWBASE
l32i a3, a1, PT_WINDOWSTART
- wsr a1, DEPC # use DEPC as temp storage
- wsr a3, WINDOWSTART # restore WINDOWSTART
+ wsr a1, depc # use DEPC as temp storage
+ wsr a3, windowstart # restore WINDOWSTART
ssr a2 # preserve user's WB in the SAR
- wsr a2, WINDOWBASE # switch to user's saved WB
+ wsr a2, windowbase # switch to user's saved WB
rsync
- rsr a1, DEPC # restore stack pointer
+ rsr a1, depc # restore stack pointer
l32i a2, a1, PT_WMASK # register frames saved (in bits 4...9)
rotw -1 # we restore a4..a7
_bltui a6, 16, 1f # only have to restore current window?
@@ -475,8 +475,8 @@ user_exception_exit:
/* Clear unrestored registers (don't leak anything to user-land */
-1: rsr a0, WINDOWBASE
- rsr a3, SAR
+1: rsr a0, windowbase
+ rsr a3, sar
sub a3, a0, a3
beqz a3, 2f
extui a3, a3, 0, WBBITS
@@ -556,7 +556,7 @@ kernel_exception_exit:
/* Test WINDOWSTART now. If spilled, do the movsp */
- rsr a3, WINDOWSTART
+ rsr a3, windowstart
addi a0, a3, -1
and a3, a3, a0
_bnez a3, common_exception_exit
@@ -604,24 +604,24 @@ common_exception_exit:
1: l32i a2, a1, PT_PC
l32i a3, a1, PT_SAR
- wsr a2, EPC_1
- wsr a3, SAR
+ wsr a2, epc1
+ wsr a3, sar
/* Restore LBEG, LEND, LCOUNT */
l32i a2, a1, PT_LBEG
l32i a3, a1, PT_LEND
- wsr a2, LBEG
+ wsr a2, lbeg
l32i a2, a1, PT_LCOUNT
- wsr a3, LEND
- wsr a2, LCOUNT
+ wsr a3, lend
+ wsr a2, lcount
/* We control single stepping through the ICOUNTLEVEL register. */
l32i a2, a1, PT_ICOUNTLEVEL
movi a3, -2
- wsr a2, ICOUNTLEVEL
- wsr a3, ICOUNT
+ wsr a2, icountlevel
+ wsr a3, icount
/* Check if it was double exception. */
@@ -636,7 +636,7 @@ common_exception_exit:
l32i a1, a1, PT_AREG1
rfe
-1: wsr a0, DEPC
+1: wsr a0, depc
l32i a0, a1, PT_AREG0
l32i a1, a1, PT_AREG1
rfde
@@ -651,25 +651,25 @@ common_exception_exit:
ENTRY(debug_exception)
- rsr a0, EPS + XCHAL_DEBUGLEVEL
+ rsr a0, SREG_EPS + XCHAL_DEBUGLEVEL
bbsi.l a0, PS_EXCM_BIT, 1f # exception mode
- /* Set EPC_1 and EXCCAUSE */
+ /* Set EPC1 and EXCCAUSE */
- wsr a2, DEPC # save a2 temporarily
- rsr a2, EPC + XCHAL_DEBUGLEVEL
- wsr a2, EPC_1
+ wsr a2, depc # save a2 temporarily
+ rsr a2, SREG_EPC + XCHAL_DEBUGLEVEL
+ wsr a2, epc1
movi a2, EXCCAUSE_MAPPED_DEBUG
- wsr a2, EXCCAUSE
+ wsr a2, exccause
/* Restore PS to the value before the debug exc but with PS.EXCM set.*/
movi a2, 1 << PS_EXCM_BIT
or a2, a0, a2
movi a0, debug_exception # restore a3, debug jump vector
- wsr a2, PS
- xsr a0, EXCSAVE + XCHAL_DEBUGLEVEL
+ wsr a2, ps
+ xsr a0, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
/* Switch to kernel/user stack, restore jump vector, and save a0 */
@@ -680,19 +680,19 @@ ENTRY(debug_exception)
movi a0, 0
s32i a1, a2, PT_AREG1
s32i a0, a2, PT_DEPC # mark it as a regular exception
- xsr a0, DEPC
+ xsr a0, depc
s32i a3, a2, PT_AREG3
s32i a0, a2, PT_AREG2
mov a1, a2
j _kernel_exception
-2: rsr a2, EXCSAVE_1
+2: rsr a2, excsave1
l32i a2, a2, EXC_TABLE_KSTK # load kernel stack pointer
s32i a0, a2, PT_AREG0
movi a0, 0
s32i a1, a2, PT_AREG1
s32i a0, a2, PT_DEPC
- xsr a0, DEPC
+ xsr a0, depc
s32i a3, a2, PT_AREG3
s32i a0, a2, PT_AREG2
mov a1, a2
@@ -732,12 +732,12 @@ ENTRY(unrecoverable_exception)
movi a0, 1
movi a1, 0
- wsr a0, WINDOWSTART
- wsr a1, WINDOWBASE
+ wsr a0, windowstart
+ wsr a1, windowbase
rsync
movi a1, (1 << PS_WOE_BIT) | 1
- wsr a1, PS
+ wsr a1, ps
rsync
movi a1, init_task
@@ -793,7 +793,7 @@ ENTRY(fast_alloca)
l32i a0, a2, PT_DEPC
_bgeui a0, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lunhandled_double
- rsr a0, DEPC # get a2
+ rsr a0, depc # get a2
s32i a4, a2, PT_AREG4 # save a4 and
s32i a0, a2, PT_AREG2 # a2 to stack
@@ -804,8 +804,8 @@ ENTRY(fast_alloca)
/* Restore a3, excsave_1 */
- xsr a3, EXCSAVE_1 # make sure excsave_1 is valid for dbl.
- rsr a4, EPC_1 # get exception address
+ xsr a3, excsave1 # make sure excsave_1 is valid for dbl.
+ rsr a4, epc1 # get exception address
s32i a3, a2, PT_AREG3 # save a3 to stack
#ifdef ALLOCA_EXCEPTION_IN_IRAM
@@ -820,7 +820,7 @@ ENTRY(fast_alloca)
jx a3
.Lunhandled_double:
- wsr a0, EXCSAVE_1
+ wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
@@ -852,7 +852,7 @@ ENTRY(fast_alloca)
#endif
addi a4, a4, 3 # step over movsp
_EXTUI_MOVSP_DST(a0) # extract destination register
- wsr a4, EPC_1 # save new epc_1
+ wsr a4, epc1 # save new epc_1
_bnei a0, 1, 1f # no 'movsp a1, ax': jump
@@ -953,14 +953,14 @@ ENTRY(fast_syscall_kernel)
/* Skip syscall. */
- rsr a0, EPC_1
+ rsr a0, epc1
addi a0, a0, 3
- wsr a0, EPC_1
+ wsr a0, epc1
l32i a0, a2, PT_DEPC
bgeui a0, VALID_DOUBLE_EXCEPTION_ADDRESS, fast_syscall_unrecoverable
- rsr a0, DEPC # get syscall-nr
+ rsr a0, depc # get syscall-nr
_beqz a0, fast_syscall_spill_registers
_beqi a0, __NR_xtensa, fast_syscall_xtensa
@@ -970,14 +970,14 @@ ENTRY(fast_syscall_user)
/* Skip syscall. */
- rsr a0, EPC_1
+ rsr a0, epc1
addi a0, a0, 3
- wsr a0, EPC_1
+ wsr a0, epc1
l32i a0, a2, PT_DEPC
bgeui a0, VALID_DOUBLE_EXCEPTION_ADDRESS, fast_syscall_unrecoverable
- rsr a0, DEPC # get syscall-nr
+ rsr a0, depc # get syscall-nr
_beqz a0, fast_syscall_spill_registers
_beqi a0, __NR_xtensa, fast_syscall_xtensa
@@ -988,10 +988,10 @@ ENTRY(fast_syscall_unrecoverable)
/* Restore all states. */
l32i a0, a2, PT_AREG0 # restore a0
- xsr a2, DEPC # restore a2, depc
- rsr a3, EXCSAVE_1
+ xsr a2, depc # restore a2, depc
+ rsr a3, excsave1
- wsr a0, EXCSAVE_1
+ wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
@@ -1047,7 +1047,7 @@ ENTRY(fast_syscall_unrecoverable)
ENTRY(fast_syscall_xtensa)
- xsr a3, EXCSAVE_1 # restore a3, excsave1
+ xsr a3, excsave1 # restore a3, excsave1
s32i a7, a2, PT_AREG7 # we need an additional register
movi a7, 4 # sizeof(unsigned int)
@@ -1124,13 +1124,13 @@ ENTRY(fast_syscall_spill_registers)
movi a0, fast_syscall_spill_registers_fixup
s32i a0, a3, EXC_TABLE_FIXUP
- rsr a0, WINDOWBASE
+ rsr a0, windowbase
s32i a0, a3, EXC_TABLE_PARAM
/* Save a3 and SAR on stack. */
- rsr a0, SAR
- xsr a3, EXCSAVE_1 # restore a3 and excsave_1
+ rsr a0, sar
+ xsr a3, excsave1 # restore a3 and excsave_1
s32i a3, a2, PT_AREG3
s32i a4, a2, PT_AREG4
s32i a0, a2, PT_AREG5 # store SAR to PT_AREG5
@@ -1148,7 +1148,7 @@ ENTRY(fast_syscall_spill_registers)
l32i a3, a2, PT_AREG5
l32i a4, a2, PT_AREG4
l32i a0, a2, PT_AREG0
- wsr a3, SAR
+ wsr a3, sar
l32i a3, a2, PT_AREG3
/* Restore clobbered registers. */
@@ -1173,8 +1173,8 @@ ENTRY(fast_syscall_spill_registers)
fast_syscall_spill_registers_fixup:
- rsr a2, WINDOWBASE # get current windowbase (a2 is saved)
- xsr a0, DEPC # restore depc and a0
+ rsr a2, windowbase # get current windowbase (a2 is saved)
+ xsr a0, depc # restore depc and a0
ssl a2 # set shift (32 - WB)
/* We need to make sure the current registers (a0-a3) are preserved.
@@ -1182,12 +1182,12 @@ fast_syscall_spill_registers_fixup:
* in WS, so that the exception handlers save them to the task stack.
*/
- rsr a3, EXCSAVE_1 # get spill-mask
+ rsr a3, excsave1 # get spill-mask
slli a2, a3, 1 # shift left by one
slli a3, a2, 32-WSBITS
src a2, a2, a3 # a1 = xxwww1yyxxxwww1yy......
- wsr a2, WINDOWSTART # set corrected windowstart
+ wsr a2, windowstart # set corrected windowstart
movi a3, exc_table
l32i a2, a3, EXC_TABLE_DOUBLE_SAVE # restore a2
@@ -1201,7 +1201,7 @@ fast_syscall_spill_registers_fixup:
* excsave_1: a3
*/
- wsr a3, WINDOWBASE
+ wsr a3, windowbase
rsync
/* We are now in the original frame when we entered _spill_registers:
@@ -1227,7 +1227,7 @@ fast_syscall_spill_registers_fixup:
/* Jump to the exception handler. */
movi a3, exc_table
- rsr a0, EXCCAUSE
+ rsr a0, exccause
addx4 a0, a0, a3 # find entry in table
l32i a0, a0, EXC_TABLE_FAST_USER # load handler
jx a0
@@ -1236,28 +1236,28 @@ fast_syscall_spill_registers_fixup_return:
/* When we return here, all registers have been restored (a2: DEPC) */
- wsr a2, DEPC # exception address
+ wsr a2, depc # exception address
/* Restore fixup handler. */
- xsr a3, EXCSAVE_1
+ xsr a3, excsave1
movi a2, fast_syscall_spill_registers_fixup
s32i a2, a3, EXC_TABLE_FIXUP
- rsr a2, WINDOWBASE
+ rsr a2, windowbase
s32i a2, a3, EXC_TABLE_PARAM
l32i a2, a3, EXC_TABLE_KSTK
/* Load WB at the time the exception occurred. */
- rsr a3, SAR # WB is still in SAR
+ rsr a3, sar # WB is still in SAR
neg a3, a3
- wsr a3, WINDOWBASE
+ wsr a3, windowbase
rsync
/* Restore a3 and return. */
movi a3, exc_table
- xsr a3, EXCSAVE_1
+ xsr a3, excsave1
rfde
@@ -1283,8 +1283,8 @@ ENTRY(_spill_registers)
* Rotate ws right so that a4 = yyxxxwww1.
*/
- rsr a4, WINDOWBASE
- rsr a3, WINDOWSTART # a3 = xxxwww1yy
+ rsr a4, windowbase
+ rsr a3, windowstart # a3 = xxxwww1yy
ssr a4 # holds WB
slli a4, a3, WSBITS
or a3, a3, a4 # a3 = xxxwww1yyxxxwww1yy
@@ -1302,7 +1302,7 @@ ENTRY(_spill_registers)
/* Skip empty frames - get 'oldest' WINDOWSTART-bit. */
- wsr a3, WINDOWSTART # save shifted windowstart
+ wsr a3, windowstart # save shifted windowstart
neg a4, a3
and a3, a4, a3 # first bit set from right: 000010000
@@ -1311,12 +1311,12 @@ ENTRY(_spill_registers)
sub a4, a3, a4 # WSBITS-a4:number of 0-bits from right
ssr a4 # save in SAR for later.
- rsr a3, WINDOWBASE
+ rsr a3, windowbase
add a3, a3, a4
- wsr a3, WINDOWBASE
+ wsr a3, windowbase
rsync
- rsr a3, WINDOWSTART
+ rsr a3, windowstart
srl a3, a3 # shift windowstart
/* WB is now just one frame below the oldest frame in the register
@@ -1364,11 +1364,11 @@ ENTRY(_spill_registers)
.Lexit: /* Done. Do the final rotation, set WS, and return. */
rotw 1
- rsr a3, WINDOWBASE
+ rsr a3, windowbase
ssl a3
movi a3, 1
sll a3, a3
- wsr a3, WINDOWSTART
+ wsr a3, windowstart
ret
.Lc4: s32e a4, a9, -16
@@ -1429,7 +1429,7 @@ ENTRY(_spill_registers)
* however, this condition is unrecoverable in kernel space.
*/
- rsr a0, PS
+ rsr a0, ps
_bbci.l a0, PS_UM_BIT, 1f
/* User space: Setup a dummy frame and kill application.
@@ -1439,18 +1439,18 @@ ENTRY(_spill_registers)
movi a0, 1
movi a1, 0
- wsr a0, WINDOWSTART
- wsr a1, WINDOWBASE
+ wsr a0, windowstart
+ wsr a1, windowbase
rsync
movi a0, 0
movi a3, exc_table
l32i a1, a3, EXC_TABLE_KSTK
- wsr a3, EXCSAVE_1
+ wsr a3, excsave1
movi a4, (1 << PS_WOE_BIT) | 1
- wsr a4, PS
+ wsr a4, ps
rsync
movi a6, SIGSEGV
@@ -1459,7 +1459,7 @@ ENTRY(_spill_registers)
1: /* Kernel space: PANIC! */
- wsr a0, EXCSAVE_1
+ wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0 # should not return
1: j 1b
@@ -1524,7 +1524,7 @@ ENTRY(fast_second_level_miss)
/* We deliberately destroy a3 that holds the exception table. */
-8: rsr a3, EXCVADDR # fault address
+8: rsr a3, excvaddr # fault address
_PGD_OFFSET(a0, a3, a1)
l32i a0, a0, 0 # read pmdval
beqz a0, 2f
@@ -1542,7 +1542,7 @@ ENTRY(fast_second_level_miss)
* pteval = ((pmdval - PAGE_OFFSET) & PAGE_MASK) | PAGE_DIRECTORY
*/
- movi a1, -PAGE_OFFSET
+ movi a1, (-PAGE_OFFSET) & 0xffffffff
add a0, a0, a1 # pmdval - PAGE_OFFSET
extui a1, a0, 0, PAGE_SHIFT # ... & PAGE_MASK
xor a0, a0, a1
@@ -1561,7 +1561,7 @@ ENTRY(fast_second_level_miss)
*/
extui a3, a3, 28, 2 # addr. bit 28 and 29 0,1,2,3
- rsr a1, PTEVADDR
+ rsr a1, ptevaddr
addx2 a3, a3, a3 # -> 0,3,6,9
srli a1, a1, PAGE_SHIFT
extui a3, a3, 2, 2 # -> 0,0,1,2
@@ -1583,18 +1583,18 @@ ENTRY(fast_second_level_miss)
l32i a0, a2, PT_AREG0
l32i a1, a2, PT_AREG1
l32i a2, a2, PT_DEPC
- xsr a3, EXCSAVE_1
+ xsr a3, excsave1
bgeui a2, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f
/* Restore excsave1 and return. */
- rsr a2, DEPC
+ rsr a2, depc
rfe
/* Return from double exception. */
-1: xsr a2, DEPC
+1: xsr a2, depc
esync
rfde
@@ -1618,7 +1618,7 @@ ENTRY(fast_second_level_miss)
/* Make sure the exception originated in the special functions */
movi a0, __tlbtemp_mapping_start
- rsr a3, EPC_1
+ rsr a3, epc1
bltu a3, a0, 2f
movi a0, __tlbtemp_mapping_end
bgeu a3, a0, 2f
@@ -1626,7 +1626,7 @@ ENTRY(fast_second_level_miss)
/* Check if excvaddr was in one of the TLBTEMP_BASE areas. */
movi a3, TLBTEMP_BASE_1
- rsr a0, EXCVADDR
+ rsr a0, excvaddr
bltu a0, a3, 2f
addi a1, a0, -(2 << (DCACHE_ALIAS_ORDER + PAGE_SHIFT))
@@ -1635,7 +1635,7 @@ ENTRY(fast_second_level_miss)
/* Check if we have to restore an ITLB mapping. */
movi a1, __tlbtemp_mapping_itlb
- rsr a3, EPC_1
+ rsr a3, epc1
sub a3, a3, a1
/* Calculate VPN */
@@ -1671,13 +1671,13 @@ ENTRY(fast_second_level_miss)
2: /* Invalid PGD, default exception handling */
movi a3, exc_table
- rsr a1, DEPC
- xsr a3, EXCSAVE_1
+ rsr a1, depc
+ xsr a3, excsave1
s32i a1, a2, PT_AREG2
s32i a3, a2, PT_AREG3
mov a1, a2
- rsr a2, PS
+ rsr a2, ps
bbsi.l a2, PS_UM_BIT, 1f
j _kernel_exception
1: j _user_exception
@@ -1712,7 +1712,7 @@ ENTRY(fast_store_prohibited)
l32i a0, a1, TASK_MM # tsk->mm
beqz a0, 9f
-8: rsr a1, EXCVADDR # fault address
+8: rsr a1, excvaddr # fault address
_PGD_OFFSET(a0, a1, a4)
l32i a0, a0, 0
beqz a0, 2f
@@ -1725,7 +1725,7 @@ ENTRY(fast_store_prohibited)
movi a1, _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_HW_WRITE
or a4, a4, a1
- rsr a1, EXCVADDR
+ rsr a1, excvaddr
s32i a4, a0, 0
/* We need to flush the cache if we have page coloring. */
@@ -1749,15 +1749,15 @@ ENTRY(fast_store_prohibited)
/* Restore excsave1 and a3. */
- xsr a3, EXCSAVE_1
+ xsr a3, excsave1
bgeui a2, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f
- rsr a2, DEPC
+ rsr a2, depc
rfe
/* Double exception. Restore FIXUP handler and return. */
-1: xsr a2, DEPC
+1: xsr a2, depc
esync
rfde
@@ -1766,14 +1766,14 @@ ENTRY(fast_store_prohibited)
2: /* If there was a problem, handle fault in C */
- rsr a4, DEPC # still holds a2
- xsr a3, EXCSAVE_1
+ rsr a4, depc # still holds a2
+ xsr a3, excsave1
s32i a4, a2, PT_AREG2
s32i a3, a2, PT_AREG3
l32i a4, a2, PT_AREG4
mov a1, a2
- rsr a2, PS
+ rsr a2, ps
bbsi.l a2, PS_UM_BIT, 1f
j _kernel_exception
1: j _user_exception
@@ -1833,50 +1833,6 @@ ENTRY(system_call)
/*
- * Create a kernel thread
- *
- * int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
- * a2 a2 a3 a4
- */
-
-ENTRY(kernel_thread)
- entry a1, 16
-
- mov a5, a2 # preserve fn over syscall
- mov a7, a3 # preserve args over syscall
-
- movi a3, _CLONE_VM | _CLONE_UNTRACED
- movi a2, __NR_clone
- or a6, a4, a3 # arg0: flags
- mov a3, a1 # arg1: sp
- syscall
-
- beq a3, a1, 1f # branch if parent
- mov a6, a7 # args
- callx4 a5 # fn(args)
-
- movi a2, __NR_exit
- syscall # return value of fn(args) still in a6
-
-1: retw
-
-/*
- * Do a system call from kernel instead of calling sys_execve, so we end up
- * with proper pt_regs.
- *
- * int kernel_execve(const char *fname, char *const argv[], charg *const envp[])
- * a2 a2 a3 a4
- */
-
-ENTRY(kernel_execve)
- entry a1, 16
- mov a6, a2 # arg0 is in a6
- movi a2, __NR_execve
- syscall
-
- retw
-
-/*
* Task switch.
*
* struct task* _switch_to (struct task* prev, struct task* next)
@@ -1901,8 +1857,8 @@ ENTRY(_switch_to)
/* Disable ints while we manipulate the stack pointer. */
movi a14, (1 << PS_EXCM_BIT) | LOCKLEVEL
- xsr a14, PS
- rsr a3, EXCSAVE_1
+ xsr a14, ps
+ rsr a3, excsave1
rsync
s32i a3, a3, EXC_TABLE_FIXUP /* enter critical section */
@@ -1910,7 +1866,7 @@ ENTRY(_switch_to)
#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
l32i a3, a5, THREAD_CPENABLE
- xsr a3, CPENABLE
+ xsr a3, cpenable
s32i a3, a4, THREAD_CPENABLE
#endif
@@ -1924,7 +1880,7 @@ ENTRY(_switch_to)
* we return from kernel space.
*/
- rsr a3, EXCSAVE_1 # exc_table
+ rsr a3, excsave1 # exc_table
movi a6, 0
addi a7, a5, PT_REGS_OFFSET
s32i a6, a3, EXC_TABLE_FIXUP
@@ -1937,7 +1893,7 @@ ENTRY(_switch_to)
load_xtregs_user a5 a6 a8 a9 a10 a11 THREAD_XTREGS_USER
- wsr a14, PS
+ wsr a14, ps
mov a2, a12 # return 'prev'
rsync
@@ -1958,3 +1914,16 @@ ENTRY(ret_from_fork)
j common_exception_return
+/*
+ * Kernel thread creation helper
+ * On entry, set up by copy_thread: a2 = thread_fn, a3 = thread_fn arg
+ * left from _switch_to: a6 = prev
+ */
+ENTRY(ret_from_kernel_thread)
+
+ call4 schedule_tail
+ mov a6, a3
+ callx4 a2
+ j common_exception_return
+
+ENDPROC(ret_from_kernel_thread)
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 3ef91a73652..bdc50788f35 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -61,18 +61,18 @@ _startup:
/* Disable interrupts and exceptions. */
movi a0, LOCKLEVEL
- wsr a0, PS
+ wsr a0, ps
/* Preserve the pointer to the boot parameter list in EXCSAVE_1 */
- wsr a2, EXCSAVE_1
+ wsr a2, excsave1
/* Start with a fresh windowbase and windowstart. */
movi a1, 1
movi a0, 0
- wsr a1, WINDOWSTART
- wsr a0, WINDOWBASE
+ wsr a1, windowstart
+ wsr a0, windowbase
rsync
/* Set a0 to 0 for the remaining initialization. */
@@ -82,46 +82,46 @@ _startup:
/* Clear debugging registers. */
#if XCHAL_HAVE_DEBUG
- wsr a0, IBREAKENABLE
- wsr a0, ICOUNT
+ wsr a0, ibreakenable
+ wsr a0, icount
movi a1, 15
- wsr a0, ICOUNTLEVEL
+ wsr a0, icountlevel
.set _index, 0
.rept XCHAL_NUM_DBREAK - 1
- wsr a0, DBREAKC + _index
+ wsr a0, SREG_DBREAKC + _index
.set _index, _index + 1
.endr
#endif
/* Clear CCOUNT (not really necessary, but nice) */
- wsr a0, CCOUNT # not really necessary, but nice
+ wsr a0, ccount # not really necessary, but nice
/* Disable zero-loops. */
#if XCHAL_HAVE_LOOPS
- wsr a0, LCOUNT
+ wsr a0, lcount
#endif
/* Disable all timers. */
.set _index, 0
.rept XCHAL_NUM_TIMERS - 1
- wsr a0, CCOMPARE + _index
+ wsr a0, SREG_CCOMPARE + _index
.set _index, _index + 1
.endr
/* Interrupt initialization. */
movi a2, XCHAL_INTTYPE_MASK_SOFTWARE | XCHAL_INTTYPE_MASK_EXTERN_EDGE
- wsr a0, INTENABLE
- wsr a2, INTCLEAR
+ wsr a0, intenable
+ wsr a2, intclear
/* Disable coprocessors. */
#if XCHAL_CP_NUM > 0
- wsr a0, CPENABLE
+ wsr a0, cpenable
#endif
/* Set PS.INTLEVEL=1, PS.WOE=0, kernel stack, PS.EXCM=0
@@ -132,7 +132,7 @@ _startup:
*/
movi a1, 1
- wsr a1, PS
+ wsr a1, ps
rsync
/* Initialize the caches.
@@ -206,18 +206,18 @@ _startup:
addi a1, a1, KERNEL_STACK_SIZE
movi a2, 0x00040001 # WOE=1, INTLEVEL=1, UM=0
- wsr a2, PS # (enable reg-windows; progmode stack)
+ wsr a2, ps # (enable reg-windows; progmode stack)
rsync
/* Set up EXCSAVE[DEBUGLEVEL] to point to the Debug Exception Handler.*/
movi a2, debug_exception
- wsr a2, EXCSAVE + XCHAL_DEBUGLEVEL
+ wsr a2, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
/* Set up EXCSAVE[1] to point to the exc_table. */
movi a6, exc_table
- xsr a6, EXCSAVE_1
+ xsr a6, excsave1
/* init_arch kick-starts the linux kernel */
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index 98e77c3ef1c..a6ce3e56373 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -72,13 +72,13 @@ int arch_show_interrupts(struct seq_file *p, int prec)
static void xtensa_irq_mask(struct irq_data *d)
{
cached_irq_mask &= ~(1 << d->irq);
- set_sr (cached_irq_mask, INTENABLE);
+ set_sr (cached_irq_mask, intenable);
}
static void xtensa_irq_unmask(struct irq_data *d)
{
cached_irq_mask |= 1 << d->irq;
- set_sr (cached_irq_mask, INTENABLE);
+ set_sr (cached_irq_mask, intenable);
}
static void xtensa_irq_enable(struct irq_data *d)
@@ -95,7 +95,7 @@ static void xtensa_irq_disable(struct irq_data *d)
static void xtensa_irq_ack(struct irq_data *d)
{
- set_sr(1 << d->irq, INTCLEAR);
+ set_sr(1 << d->irq, intclear);
}
static int xtensa_irq_retrigger(struct irq_data *d)
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index bc020825cce..09ae7bfab9a 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -45,6 +45,7 @@
#include <asm/regs.h>
extern void ret_from_fork(void);
+extern void ret_from_kernel_thread(void);
struct task_struct *current_set[NR_CPUS] = {&init_task, };
@@ -158,64 +159,123 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
/*
* Copy thread.
*
+ * There are two modes in which this function is called:
+ * 1) Userspace thread creation,
+ * regs != NULL, usp_thread_fn is userspace stack pointer.
+ * It is expected to copy parent regs (in case CLONE_VM is not set
+ * in the clone_flags) and set up passed usp in the childregs.
+ * 2) Kernel thread creation,
+ * regs == NULL, usp_thread_fn is the function to run in the new thread
+ * and thread_fn_arg is its parameter.
+ * childregs are not used for the kernel threads.
+ *
* The stack layout for the new thread looks like this:
*
- * +------------------------+ <- sp in childregs (= tos)
+ * +------------------------+
* | childregs |
* +------------------------+ <- thread.sp = sp in dummy-frame
* | dummy-frame | (saved in dummy-frame spill-area)
* +------------------------+
*
- * We create a dummy frame to return to ret_from_fork:
- * a0 points to ret_from_fork (simulating a call4)
+ * We create a dummy frame to return to either ret_from_fork or
+ * ret_from_kernel_thread:
+ * a0 points to ret_from_fork/ret_from_kernel_thread (simulating a call4)
* sp points to itself (thread.sp)
- * a2, a3 are unused.
+ * a2, a3 are unused for userspace threads,
+ * a2 points to thread_fn, a3 holds thread_fn arg for kernel threads.
*
* Note: This is a pristine frame, so we don't need any spill region on top of
* childregs.
+ *
+ * The fun part: if we're keeping the same VM (i.e. cloning a thread,
+ * not an entire process), we're normally given a new usp, and we CANNOT share
+ * any live address register windows. If we just copy those live frames over,
+ * the two threads (parent and child) will overflow the same frames onto the
+ * parent stack at different times, likely corrupting the parent stack (esp.
+ * if the parent returns from functions that called clone() and calls new
+ * ones, before the child overflows its now old copies of its parent windows).
+ * One solution is to spill windows to the parent stack, but that's fairly
+ * involved. Much simpler to just not copy those live frames across.
*/
-int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct * p, struct pt_regs * regs)
+int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
+ unsigned long thread_fn_arg,
+ struct task_struct *p, struct pt_regs *unused)
{
- struct pt_regs *childregs;
- struct thread_info *ti;
- unsigned long tos;
- int user_mode = user_mode(regs);
-
- /* Set up new TSS. */
- tos = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- if (user_mode)
- childregs = (struct pt_regs*)(tos - PT_USER_SIZE);
- else
- childregs = (struct pt_regs*)tos - 1;
+ struct pt_regs *childregs = task_pt_regs(p);
- *childregs = *regs;
+#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
+ struct thread_info *ti;
+#endif
/* Create a call4 dummy-frame: a0 = 0, a1 = childregs. */
*((int*)childregs - 3) = (unsigned long)childregs;
*((int*)childregs - 4) = 0;
- childregs->areg[1] = tos;
- childregs->areg[2] = 0;
- p->set_child_tid = p->clear_child_tid = NULL;
- p->thread.ra = MAKE_RA_FOR_CALL((unsigned long)ret_from_fork, 0x1);
p->thread.sp = (unsigned long)childregs;
- if (user_mode(regs)) {
+ if (!(p->flags & PF_KTHREAD)) {
+ struct pt_regs *regs = current_pt_regs();
+ unsigned long usp = usp_thread_fn ?
+ usp_thread_fn : regs->areg[1];
- int len = childregs->wmask & ~0xf;
+ p->thread.ra = MAKE_RA_FOR_CALL(
+ (unsigned long)ret_from_fork, 0x1);
+
+ /* This does not copy all the regs.
+ * In a bout of brilliance or madness,
+ * ARs beyond a0-a15 exist past the end of the struct.
+ */
+ *childregs = *regs;
childregs->areg[1] = usp;
- memcpy(&childregs->areg[XCHAL_NUM_AREGS - len/4],
- &regs->areg[XCHAL_NUM_AREGS - len/4], len);
+ childregs->areg[2] = 0;
+
+ /* When sharing memory with the parent thread, the child
+ usually starts on a pristine stack, so we have to reset
+ windowbase, windowstart and wmask.
+ (Note that such a new thread is required to always create
+ an initial call4 frame)
+ The exception is vfork, where the new thread continues to
+ run on the parent's stack until it calls execve. This could
+ be a call8 or call12, which requires a legal stack frame
+ of the previous caller for the overflow handlers to work.
+ (Note that it's always legal to overflow live registers).
+ In this case, ensure to spill at least the stack pointer
+ of that frame. */
+
+ if (clone_flags & CLONE_VM) {
+ /* check that caller window is live and same stack */
+ int len = childregs->wmask & ~0xf;
+ if (regs->areg[1] == usp && len != 0) {
+ int callinc = (regs->areg[0] >> 30) & 3;
+ int caller_ars = XCHAL_NUM_AREGS - callinc * 4;
+ put_user(regs->areg[caller_ars+1],
+ (unsigned __user*)(usp - 12));
+ }
+ childregs->wmask = 1;
+ childregs->windowstart = 1;
+ childregs->windowbase = 0;
+ } else {
+ int len = childregs->wmask & ~0xf;
+ memcpy(&childregs->areg[XCHAL_NUM_AREGS - len/4],
+ &regs->areg[XCHAL_NUM_AREGS - len/4], len);
+ }
// FIXME: we need to set THREADPTR in thread_info...
if (clone_flags & CLONE_SETTLS)
childregs->areg[2] = childregs->areg[6];
-
} else {
- /* In kernel space, we start a new thread with a new stack. */
- childregs->wmask = 1;
+ p->thread.ra = MAKE_RA_FOR_CALL(
+ (unsigned long)ret_from_kernel_thread, 1);
+
+ /* pass parameters to ret_from_kernel_thread:
+ * a2 = thread_fn, a3 = thread_fn arg
+ */
+ *((int *)childregs - 1) = thread_fn_arg;
+ *((int *)childregs - 2) = usp_thread_fn;
+
+ /* Childregs are only used when we're going to userspace
+ * in which case start_thread will set them up.
+ */
}
#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
@@ -311,32 +371,5 @@ long xtensa_clone(unsigned long clone_flags, unsigned long newsp,
void __user *child_tid, long a5,
struct pt_regs *regs)
{
- if (!newsp)
- newsp = regs->areg[1];
return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
}
-
-/*
- * xtensa_execve() executes a new program.
- */
-
-asmlinkage
-long xtensa_execve(const char __user *name,
- const char __user *const __user *argv,
- const char __user *const __user *envp,
- long a3, long a4, long a5,
- struct pt_regs *regs)
-{
- long error;
- struct filename *filename;
-
- filename = getname(name);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
-out:
- return error;
-}
-
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 270360d9806..b237988ba6d 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -100,7 +100,7 @@ typedef struct tagtable {
} tagtable_t;
#define __tagtable(tag, fn) static tagtable_t __tagtable_##fn \
- __attribute__((unused, __section__(".taglist"))) = { tag, fn }
+ __attribute__((used, section(".taglist"))) = { tag, fn }
/* parse current tag */
@@ -120,7 +120,7 @@ static int __init parse_tag_mem(const bp_tag_t *tag)
}
sysmem.bank[sysmem.nr_banks].type = mi->type;
sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(mi->start);
- sysmem.bank[sysmem.nr_banks].end = mi->end & PAGE_SIZE;
+ sysmem.bank[sysmem.nr_banks].end = mi->end & PAGE_MASK;
sysmem.nr_banks++;
return 0;
diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
index 05b3f093d5d..5702065f472 100644
--- a/arch/xtensa/kernel/syscall.c
+++ b/arch/xtensa/kernel/syscall.c
@@ -32,11 +32,8 @@ typedef void (*syscall_t)(void);
syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= {
[0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall,
-#undef __SYSCALL
#define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol,
-#undef _XTENSA_UNISTD_H
-#undef __KERNEL_SYSCALLS__
-#include <asm/unistd.h>
+#include <uapi/asm/unistd.h>
};
asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
@@ -50,7 +47,8 @@ asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
return (long)ret;
}
-asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len)
+asmlinkage long xtensa_fadvise64_64(int fd, int advice,
+ unsigned long long offset, unsigned long long len)
{
return sys_fadvise64_64(fd, offset, len, advice);
}
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index bc1e14cf936..5caf2b64d43 100644
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -97,7 +97,7 @@ static dispatch_init_table_t __initdata dispatch_init_table[] = {
/* EXCCAUSE_INTEGER_DIVIDE_BY_ZERO unhandled */
/* EXCCAUSE_PRIVILEGED unhandled */
#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
-#ifdef CONFIG_UNALIGNED_USER
+#ifdef CONFIG_XTENSA_UNALIGNED_USER
{ EXCCAUSE_UNALIGNED, USER, fast_unaligned },
#else
{ EXCCAUSE_UNALIGNED, 0, do_unaligned_user },
@@ -202,8 +202,8 @@ extern void do_IRQ(int, struct pt_regs *);
void do_interrupt (struct pt_regs *regs)
{
- unsigned long intread = get_sr (INTREAD);
- unsigned long intenable = get_sr (INTENABLE);
+ unsigned long intread = get_sr (interrupt);
+ unsigned long intenable = get_sr (intenable);
int i, mask;
/* Handle all interrupts (no priorities).
@@ -213,7 +213,7 @@ void do_interrupt (struct pt_regs *regs)
for (i=0, mask = 1; i < XCHAL_NUM_INTERRUPTS; i++, mask <<= 1) {
if (mask & (intread & intenable)) {
- set_sr (mask, INTCLEAR);
+ set_sr (mask, intclear);
do_IRQ (i,regs);
}
}
@@ -244,7 +244,7 @@ do_illegal_instruction(struct pt_regs *regs)
*/
#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
-#ifndef CONFIG_UNALIGNED_USER
+#ifndef CONFIG_XTENSA_UNALIGNED_USER
void
do_unaligned_user (struct pt_regs *regs)
{
@@ -339,7 +339,7 @@ void __init trap_init(void)
/* Initialize EXCSAVE_1 to hold the address of the exception table. */
i = (unsigned long)exc_table;
- __asm__ __volatile__("wsr %0, "__stringify(EXCSAVE_1)"\n" : : "a" (i));
+ __asm__ __volatile__("wsr %0, excsave1\n" : : "a" (i));
}
/*
@@ -386,16 +386,16 @@ static inline void spill_registers(void)
unsigned int a0, ps;
__asm__ __volatile__ (
- "movi a14," __stringify (PS_EXCM_BIT) " | 1\n\t"
+ "movi a14, " __stringify(PS_EXCM_BIT | 1) "\n\t"
"mov a12, a0\n\t"
- "rsr a13," __stringify(SAR) "\n\t"
- "xsr a14," __stringify(PS) "\n\t"
+ "rsr a13, sar\n\t"
+ "xsr a14, ps\n\t"
"movi a0, _spill_registers\n\t"
"rsync\n\t"
"callx0 a0\n\t"
"mov a0, a12\n\t"
- "wsr a13," __stringify(SAR) "\n\t"
- "wsr a14," __stringify(PS) "\n\t"
+ "wsr a13, sar\n\t"
+ "wsr a14, ps\n\t"
:: "a" (&a0), "a" (&ps)
: "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", "memory");
}
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S
index 70066e3582d..4462c1e595c 100644
--- a/arch/xtensa/kernel/vectors.S
+++ b/arch/xtensa/kernel/vectors.S
@@ -69,11 +69,11 @@
ENTRY(_UserExceptionVector)
- xsr a3, EXCSAVE_1 # save a3 and get dispatch table
- wsr a2, DEPC # save a2
+ xsr a3, excsave1 # save a3 and get dispatch table
+ wsr a2, depc # save a2
l32i a2, a3, EXC_TABLE_KSTK # load kernel stack to a2
s32i a0, a2, PT_AREG0 # save a0 to ESF
- rsr a0, EXCCAUSE # retrieve exception cause
+ rsr a0, exccause # retrieve exception cause
s32i a0, a2, PT_DEPC # mark it as a regular exception
addx4 a0, a0, a3 # find entry in table
l32i a0, a0, EXC_TABLE_FAST_USER # load handler
@@ -93,11 +93,11 @@ ENTRY(_UserExceptionVector)
ENTRY(_KernelExceptionVector)
- xsr a3, EXCSAVE_1 # save a3, and get dispatch table
- wsr a2, DEPC # save a2
+ xsr a3, excsave1 # save a3, and get dispatch table
+ wsr a2, depc # save a2
addi a2, a1, -16-PT_SIZE # adjust stack pointer
s32i a0, a2, PT_AREG0 # save a0 to ESF
- rsr a0, EXCCAUSE # retrieve exception cause
+ rsr a0, exccause # retrieve exception cause
s32i a0, a2, PT_DEPC # mark it as a regular exception
addx4 a0, a0, a3 # find entry in table
l32i a0, a0, EXC_TABLE_FAST_KERNEL # load handler address
@@ -205,17 +205,17 @@ ENTRY(_DoubleExceptionVector)
/* Deliberately destroy excsave (don't assume it's value was valid). */
- wsr a3, EXCSAVE_1 # save a3
+ wsr a3, excsave1 # save a3
/* Check for kernel double exception (usually fatal). */
- rsr a3, PS
+ rsr a3, ps
_bbci.l a3, PS_UM_BIT, .Lksp
/* Check if we are currently handling a window exception. */
/* Note: We don't need to indicate that we enter a critical section. */
- xsr a0, DEPC # get DEPC, save a0
+ xsr a0, depc # get DEPC, save a0
movi a3, XCHAL_WINDOW_VECTORS_VADDR
_bltu a0, a3, .Lfixup
@@ -243,21 +243,21 @@ ENTRY(_DoubleExceptionVector)
* Note: We can trash the current window frame (a0...a3) and depc!
*/
- wsr a2, DEPC # save stack pointer temporarily
- rsr a0, PS
+ wsr a2, depc # save stack pointer temporarily
+ rsr a0, ps
extui a0, a0, PS_OWB_SHIFT, 4
- wsr a0, WINDOWBASE
+ wsr a0, windowbase
rsync
/* We are now in the previous window frame. Save registers again. */
- xsr a2, DEPC # save a2 and get stack pointer
+ xsr a2, depc # save a2 and get stack pointer
s32i a0, a2, PT_AREG0
- wsr a3, EXCSAVE_1 # save a3
+ wsr a3, excsave1 # save a3
movi a3, exc_table
- rsr a0, EXCCAUSE
+ rsr a0, exccause
s32i a0, a2, PT_DEPC # mark it as a regular exception
addx4 a0, a0, a3
l32i a0, a0, EXC_TABLE_FAST_USER
@@ -290,14 +290,14 @@ ENTRY(_DoubleExceptionVector)
/* a0: depc, a1: a1, a2: kstk, a3: a2, depc: a0, excsave: a3 */
- xsr a3, DEPC
+ xsr a3, depc
s32i a0, a2, PT_DEPC
s32i a3, a2, PT_AREG0
/* a0: avail, a1: a1, a2: kstk, a3: avail, depc: a2, excsave: a3 */
movi a3, exc_table
- rsr a0, EXCCAUSE
+ rsr a0, exccause
addx4 a0, a0, a3
l32i a0, a0, EXC_TABLE_FAST_USER
jx a0
@@ -312,7 +312,7 @@ ENTRY(_DoubleExceptionVector)
.Lksp: /* a0: a0, a1: a1, a2: a2, a3: trashed, depc: depc, excsave: a3 */
- rsr a3, EXCCAUSE
+ rsr a3, exccause
beqi a3, EXCCAUSE_ITLB_MISS, 1f
addi a3, a3, -EXCCAUSE_DTLB_MISS
bnez a3, .Lunrecoverable
@@ -328,11 +328,11 @@ ENTRY(_DoubleExceptionVector)
.Lunrecoverable_fixup:
l32i a2, a3, EXC_TABLE_DOUBLE_SAVE
- xsr a0, DEPC
+ xsr a0, depc
.Lunrecoverable:
- rsr a3, EXCSAVE_1
- wsr a0, EXCSAVE_1
+ rsr a3, excsave1
+ wsr a0, excsave1
movi a0, unrecoverable_exception
callx0 a0
@@ -349,7 +349,7 @@ ENTRY(_DoubleExceptionVector)
.section .DebugInterruptVector.text, "ax"
ENTRY(_DebugInterruptVector)
- xsr a0, EXCSAVE + XCHAL_DEBUGLEVEL
+ xsr a0, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
jx a0
diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c
index a8b9f1fd1e1..afe058b24e6 100644
--- a/arch/xtensa/kernel/xtensa_ksyms.c
+++ b/arch/xtensa/kernel/xtensa_ksyms.c
@@ -43,7 +43,6 @@ EXPORT_SYMBOL(__strncpy_user);
EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL(copy_page);
-EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(empty_zero_page);
/*
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-15 15:01:35 +0000