powerpc/32: Use START_EXCEPTION() as much as possible

Everywhere where it is possible, use START_EXCEPTION().

This will help for proper exception init in future patches.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/d47c1cc242bbbef8658327503726abdaef9b63ef.1615552867.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 55fa99c..c14a71e 100644 (file)
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -247,17 +247,15 @@ _ENTRY(crit_esr)
        EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_STD)
 
 /* 0x1000 - Programmable Interval Timer (PIT) Exception */
-       . = 0x1000
+       START_EXCEPTION(0x1000, DecrementerTrap)
        b Decrementer
 
-/* 0x1010 - Fixed Interval Timer (FIT) Exception
-*/
-       . = 0x1010
+/* 0x1010 - Fixed Interval Timer (FIT) Exception */
+       START_EXCEPTION(0x1010, FITExceptionTrap)
        b FITException
 
-/* 0x1020 - Watchdog Timer (WDT) Exception
-*/
-       . = 0x1020
+/* 0x1020 - Watchdog Timer (WDT) Exception */
+       START_EXCEPTION(0x1020, WDTExceptionTrap)
        b WDTException
 
 /* 0x1100 - Data TLB Miss Exception

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index b63445c..11789a0 100644 (file)
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -121,8 +121,7 @@ instruction_counter:
        EXCEPTION(0x100, Reset, system_reset_exception, EXC_XFER_STD)
 
 /* Machine check */
-       . = 0x200
-MachineCheck:
+       START_EXCEPTION(0x200, MachineCheck)
        EXCEPTION_PROLOG handle_dar_dsisr=1
        addi r3,r1,STACK_FRAME_OVERHEAD
        EXC_XFER_STD(0x200, machine_check_exception)
@@ -131,8 +130,7 @@ MachineCheck:
        EXCEPTION(0x500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE)
 
 /* Alignment exception */
-       . = 0x600
-Alignment:
+       START_EXCEPTION(0x600, Alignment)
        EXCEPTION_PROLOG handle_dar_dsisr=1
        addi    r3,r1,STACK_FRAME_OVERHEAD
        b       .Lalignment_exception_ool
@@ -149,8 +147,7 @@ Alignment:
        EXC_XFER_STD(0x600, alignment_exception)
 
 /* System call */
-       . = 0xc00
-SystemCall:
+       START_EXCEPTION(0xc00, SystemCall)
        SYSCALL_ENTRY   0xc00
 
 /* Single step - not used on 601 */
@@ -161,7 +158,6 @@ SystemCall:
  */
        EXCEPTION(0x1000, SoftEmu, emulation_assist_interrupt, EXC_XFER_STD)
 
-       . = 0x1100
 /*
  * For the MPC8xx, this is a software tablewalk to load the instruction
  * TLB.  The task switch loads the M_TWB register with the pointer to the first
@@ -183,7 +179,7 @@ SystemCall:
 #define INVALIDATE_ADJACENT_PAGES_CPU15(addr, tmp)
 #endif
 
-InstructionTLBMiss:
+       START_EXCEPTION(0x1100, InstructionTLBMiss)
        mtspr   SPRN_SPRG_SCRATCH2, r10
        mtspr   SPRN_M_TW, r11
 
@@ -239,8 +235,7 @@ InstructionTLBMiss:
        rfi
 #endif
 
-       . = 0x1200
-DataStoreTLBMiss:
+       START_EXCEPTION(0x1200, DataStoreTLBMiss)
        mtspr   SPRN_SPRG_SCRATCH2, r10
        mtspr   SPRN_M_TW, r11
        mfcr    r11
@@ -303,8 +298,7 @@ DataStoreTLBMiss:
  * to many reasons, such as executing guarded memory or illegal instruction
  * addresses.  There is nothing to do but handle a big time error fault.
  */
-       . = 0x1300
-InstructionTLBError:
+       START_EXCEPTION(0x1300, InstructionTLBError)
        EXCEPTION_PROLOG
        andis.  r5,r9,DSISR_SRR1_MATCH_32S@h /* Filter relevant SRR1 bits */
        andis.  r10,r9,SRR1_ISI_NOPT@h
@@ -320,8 +314,7 @@ InstructionTLBError:
  * many reasons, including a dirty update to a pte.  We bail out to
  * a higher level function that can handle it.
  */
-       . = 0x1400
-DataTLBError:
+       START_EXCEPTION(0x1400, DataTLBError)
        EXCEPTION_PROLOG_0 handle_dar_dsisr=1
        mfspr   r11, SPRN_DAR
        cmpwi   cr1, r11, RPN_PATTERN
@@ -354,8 +347,7 @@ do_databreakpoint:
        stw     r4,_DAR(r11)
        EXC_XFER_STD(0x1c00, do_break)
 
-       . = 0x1c00
-DataBreakpoint:
+       START_EXCEPTION(0x1c00, DataBreakpoint)
        EXCEPTION_PROLOG_0 handle_dar_dsisr=1
        mfspr   r11, SPRN_SRR0
        cmplwi  cr1, r11, (.Ldtlbie - PAGE_OFFSET)@l
@@ -368,8 +360,7 @@ DataBreakpoint:
        rfi
 
 #ifdef CONFIG_PERF_EVENTS
-       . = 0x1d00
-InstructionBreakpoint:
+       START_EXCEPTION(0x1d00, InstructionBreakpoint)
        mtspr   SPRN_SPRG_SCRATCH0, r10
        lwz     r10, (instruction_counter - PAGE_OFFSET)@l(0)
        addi    r10, r10, -1

diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/head_book3s_32.S
index 79a7715..17510c9 100644 (file)
--- a/arch/powerpc/kernel/head_book3s_32.S
+++ b/arch/powerpc/kernel/head_book3s_32.S
@@ -255,9 +255,7 @@ __secondary_hold_acknowledge:
  * pointer when we take an exception from supervisor mode.)
  *     -- paulus.
  */
-       . = 0x200
-       DO_KVM  0x200
-MachineCheck:
+       START_EXCEPTION(0x200, MachineCheck)
        EXCEPTION_PROLOG_0
 #ifdef CONFIG_PPC_CHRP
        mtspr   SPRN_SPRG_SCRATCH2,r1
@@ -278,9 +276,7 @@ MachineCheck:
 #endif
 
 /* Data access exception. */
-       . = 0x300
-       DO_KVM  0x300
-DataAccess:
+       START_EXCEPTION(0x300, DataAccess)
 #ifdef CONFIG_PPC_BOOK3S_604
 BEGIN_MMU_FTR_SECTION
        mtspr   SPRN_SPRG_SCRATCH2,r10
@@ -304,9 +300,7 @@ ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_HPTE_TABLE)
        b       handle_page_fault_tramp_1
 
 /* Instruction access exception. */
-       . = 0x400
-       DO_KVM  0x400
-InstructionAccess:
+       START_EXCEPTION(0x400, InstructionAccess)
        mtspr   SPRN_SPRG_SCRATCH0,r10
        mtspr   SPRN_SPRG_SCRATCH1,r11
        mfspr   r10, SPRN_SPRG_THREAD
@@ -336,9 +330,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
        EXCEPTION(0x500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE)
 
 /* Alignment exception */
-       . = 0x600
-       DO_KVM  0x600
-Alignment:
+       START_EXCEPTION(0x600, Alignment)
        EXCEPTION_PROLOG handle_dar_dsisr=1
        addi    r3,r1,STACK_FRAME_OVERHEAD
        b       alignment_exception_tramp
@@ -347,9 +339,7 @@ Alignment:
        EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD)
 
 /* Floating-point unavailable */
-       . = 0x800
-       DO_KVM  0x800
-FPUnavailable:
+       START_EXCEPTION(0x800, FPUnavailable)
 #ifdef CONFIG_PPC_FPU
 BEGIN_FTR_SECTION
 /*
@@ -375,9 +365,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_FPU_UNAVAILABLE)
        EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_STD)
 
 /* System call */
-       . = 0xc00
-       DO_KVM  0xc00
-SystemCall:
+       START_EXCEPTION(0xc00, SystemCall)
        SYSCALL_ENTRY   0xc00
 
        EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD)
@@ -391,12 +379,10 @@ SystemCall:
  * non-altivec kernel running on a machine with altivec just
  * by executing an altivec instruction.
  */
-       . = 0xf00
-       DO_KVM  0xf00
+       START_EXCEPTION(0xf00, PerformanceMonitorTrap)
        b       PerformanceMonitor
 
-       . = 0xf20
-       DO_KVM  0xf20
+       START_EXCEPTION(0xf20, AltiVecUnavailableTrap)
        b       AltiVecUnavailable
 
 /*