* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/config.h>
#include <asm/asm-offsets.h>
/* we have the following possibilities to act on an interruption:
#include <asm/psw.h>
+#include <asm/cache.h> /* for L1_CACHE_SHIFT */
#include <asm/assembly.h> /* for LDREG/STREG defines */
#include <asm/pgtable.h>
#include <asm/signal.h>
#include <asm/unistd.h>
#include <asm/thread_info.h>
-#ifdef CONFIG_64BIT
-#define CMPIB cmpib,*
-#define CMPB cmpb,*
-#define COND(x) *x
+#include <linux/linkage.h>
+#ifdef CONFIG_64BIT
.level 2.0w
#else
-#define CMPIB cmpib,
-#define CMPB cmpb,
-#define COND(x) x
-
.level 2.0
#endif
* The "get_stack" macros are responsible for determining the
* kernel stack value.
*
- * For Faults:
* If sr7 == 0
* Already using a kernel stack, so call the
* get_stack_use_r30 macro to push a pt_regs structure
* task pointer pointed to by cr30. Set the stack
* pointer to point to the end of the task structure.
*
- * For Interrupts:
- * If sr7 == 0
- * Already using a kernel stack, check to see if r30
- * is already pointing to the per processor interrupt
- * stack. If it is, call the get_stack_use_r30 macro
- * to push a pt_regs structure on the stack, and store
- * registers there. Otherwise, call get_stack_use_cr31
- * to get a pointer to the base of the interrupt stack
- * and push a pt_regs structure on that stack.
- * else
- * Need to set up a kernel stack, so call the
- * get_stack_use_cr30 macro to set up a pointer
- * to the pt_regs structure contained within the
- * task pointer pointed to by cr30. Set the stack
- * pointer to point to the end of the task structure.
- * N.B: We don't use the interrupt stack for the
- * first interrupt from userland, because signals/
- * resched's are processed when returning to userland,
- * and we can sleep in those cases.
- *
* Note that we use shadowed registers for temps until
* we can save %r26 and %r29. %r26 is used to preserve
* %r8 (a shadowed register) which temporarily contained
/* Register definitions for tlb miss handler macros */
- va = r8 /* virtual address for which the trap occured */
- spc = r24 /* space for which the trap occured */
+ va = r8 /* virtual address for which the trap occurred */
+ spc = r24 /* space for which the trap occurred */
#ifndef CONFIG_64BIT
#ifndef CONFIG_64BIT
/*
* naitlb miss interruption handler (parisc 1.1 - 32 bit)
- *
- * Note: naitlb misses will be treated
- * as an ordinary itlb miss for now.
- * However, note that naitlb misses
- * have the faulting address in the
- * IOR/ISR.
*/
.macro naitlb_11 code
mfctl %isr,spc
- b itlb_miss_11
+ b naitlb_miss_11
mfctl %ior,va
- /* FIXME: If user causes a naitlb miss, the priv level may not be in
- * lower bits of va, where the itlb miss handler is expecting them
- */
.align 32
.endm
/*
* naitlb miss interruption handler (parisc 2.0)
- *
- * Note: naitlb misses will be treated
- * as an ordinary itlb miss for now.
- * However, note that naitlb misses
- * have the faulting address in the
- * IOR/ISR.
*/
.macro naitlb_20 code
mfctl %isr,spc
#ifdef CONFIG_64BIT
- b itlb_miss_20w
+ b naitlb_miss_20w
#else
- b itlb_miss_20
+ b naitlb_miss_20
#endif
mfctl %ior,va
- /* FIXME: If user causes a naitlb miss, the priv level may not be in
- * lower bits of va, where the itlb miss handler is expecting them
- */
.align 32
.endm
.align 32
.endm
- /* The following are simple 32 vs 64 bit instruction
- * abstractions for the macros */
- .macro EXTR reg1,start,length,reg2
-#ifdef CONFIG_64BIT
- extrd,u \reg1,32+\start,\length,\reg2
-#else
- extrw,u \reg1,\start,\length,\reg2
-#endif
- .endm
-
- .macro DEP reg1,start,length,reg2
-#ifdef CONFIG_64BIT
- depd \reg1,32+\start,\length,\reg2
-#else
- depw \reg1,\start,\length,\reg2
-#endif
- .endm
-
- .macro DEPI val,start,length,reg
-#ifdef CONFIG_64BIT
- depdi \val,32+\start,\length,\reg
-#else
- depwi \val,\start,\length,\reg
-#endif
- .endm
-
/* In LP64, the space contains part of the upper 32 bits of the
* fault. We have to extract this and place it in the va,
* zeroing the corresponding bits in the space register */
*/
.macro L2_ptep pmd,pte,index,va,fault
#if PT_NLEVELS == 3
- EXTR \va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index
+ extru \va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index
#else
- EXTR \va,31-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
+ extru \va,31-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
#endif
- DEP %r0,31,PAGE_SHIFT,\pmd /* clear offset */
+ dep %r0,31,PAGE_SHIFT,\pmd /* clear offset */
copy %r0,\pte
ldw,s \index(\pmd),\pmd
bb,>=,n \pmd,_PxD_PRESENT_BIT,\fault
- DEP %r0,31,PxD_FLAG_SHIFT,\pmd /* clear flags */
+ dep %r0,31,PxD_FLAG_SHIFT,\pmd /* clear flags */
copy \pmd,%r9
-#ifdef CONFIG_64BIT
- shld %r9,PxD_VALUE_SHIFT,\pmd
-#else
- shlw %r9,PxD_VALUE_SHIFT,\pmd
-#endif
- EXTR \va,31-PAGE_SHIFT,ASM_BITS_PER_PTE,\index
- DEP %r0,31,PAGE_SHIFT,\pmd /* clear offset */
+ SHLREG %r9,PxD_VALUE_SHIFT,\pmd
+ extru \va,31-PAGE_SHIFT,ASM_BITS_PER_PTE,\index
+ dep %r0,31,PAGE_SHIFT,\pmd /* clear offset */
shladd \index,BITS_PER_PTE_ENTRY,\pmd,\pmd
LDREG %r0(\pmd),\pte /* pmd is now pte */
bb,>=,n \pte,_PAGE_PRESENT_BIT,\fault
* all ILP32 processes and all the kernel for machines with
* under 4GB of memory) */
.macro L3_ptep pgd,pte,index,va,fault
+#if PT_NLEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */
extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
copy %r0,\pte
- extrd,u,*= \va,31,32,%r0
+ extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
ldw,s \index(\pgd),\pgd
- extrd,u,*= \va,31,32,%r0
+ extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
bb,>=,n \pgd,_PxD_PRESENT_BIT,\fault
- extrd,u,*= \va,31,32,%r0
+ extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
shld \pgd,PxD_VALUE_SHIFT,\index
- extrd,u,*= \va,31,32,%r0
+ extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
copy \index,\pgd
- extrd,u,*<> \va,31,32,%r0
+ extrd,u,*<> \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
ldo ASM_PGD_PMD_OFFSET(\pgd),\pgd
+#endif
L2_ptep \pgd,\pte,\index,\va,\fault
.endm
STREG \pte,0(\ptep)
.endm
+ /* bitshift difference between a PFN (based on kernel's PAGE_SIZE)
+ * to a CPU TLB 4k PFN (4k => 12 bits to shift) */
+ #define PAGE_ADD_SHIFT (PAGE_SHIFT-12)
+
+ /* Drop prot bits and convert to page addr for iitlbt and idtlbt */
+ .macro convert_for_tlb_insert20 pte
+ extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\
+ 64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte
+ depdi _PAGE_SIZE_ENCODING_DEFAULT,63,\
+ (63-58)+PAGE_ADD_SHIFT,\pte
+ .endm
+
/* Convert the pte and prot to tlb insertion values. How
* this happens is quite subtle, read below */
.macro make_insert_tlb spc,pte,prot
extrd,u,*= \pte,_PAGE_GATEWAY_BIT+32,1,%r0
depd %r0,11,2,\prot /* If Gateway, Set PL2 to 0 */
- /* Get rid of prot bits and convert to page addr for iitlbt */
+ /* Enforce uncacheable pages.
+ * This should ONLY be use for MMIO on PA 2.0 machines.
+ * Memory/DMA is cache coherent on all PA2.0 machines we support
+ * (that means T-class is NOT supported) and the memory controllers
+ * on most of those machines only handles cache transactions.
+ */
+ extrd,u,*= \pte,_PAGE_NO_CACHE_BIT+32,1,%r0
+ depdi 1,12,1,\prot
- depd %r0,63,PAGE_SHIFT,\pte
- extrd,u \pte,56,32,\pte
+ /* Drop prot bits and convert to page addr for iitlbt and idtlbt */
+ convert_for_tlb_insert20 \pte
.endm
/* Identical macro to make_insert_tlb above, except it
/* Get rid of prot bits and convert to page addr for iitlba */
- depi 0,31,12,\pte
- extru \pte,24,25,\pte
-
+ depi 0,31,ASM_PFN_PTE_SHIFT,\pte
+ SHRREG \pte,(ASM_PFN_PTE_SHIFT-(31-26)),\pte
.endm
/* This is for ILP32 PA2.0 only. The TLB insertion needs
depdi 0,31,32,\tmp
#endif
copy \va,\tmp1
- DEPI 0,31,23,\tmp1
+ depi 0,31,23,\tmp1
cmpb,COND(<>),n \tmp,\tmp1,\fault
- ldi (_PAGE_DIRTY|_PAGE_WRITE|_PAGE_READ),\prot
+ mfctl %cr19,\tmp /* iir */
+ /* get the opcode (first six bits) into \tmp */
+ extrw,u \tmp,5,6,\tmp
+ /*
+ * Only setting the T bit prevents data cache movein
+ * Setting access rights to zero prevents instruction cache movein
+ *
+ * Note subtlety here: _PAGE_GATEWAY, _PAGE_EXEC and _PAGE_WRITE go
+ * to type field and _PAGE_READ goes to top bit of PL1
+ */
+ ldi (_PAGE_REFTRAP|_PAGE_READ|_PAGE_WRITE),\prot
+ /*
+ * so if the opcode is one (i.e. this is a memory management
+ * instruction) nullify the next load so \prot is only T.
+ * Otherwise this is a normal data operation
+ */
+ cmpiclr,= 0x01,\tmp,%r0
+ ldi (_PAGE_DIRTY|_PAGE_READ|_PAGE_WRITE),\prot
+#ifdef CONFIG_64BIT
depd,z \prot,8,7,\prot
+#else
+ depw,z \prot,8,7,\prot
+#endif
/*
* OK, it is in the temp alias region, check whether "from" or "to".
* Check "subtle" note in pacache.S re: r23/r26.
* the static part of the kernel address space.
*/
- .export fault_vector_20
-
.text
- .align 4096
+ .align PAGE_SIZE
-fault_vector_20:
+ENTRY(fault_vector_20)
/* First vector is invalid (0) */
.ascii "cows can fly"
.byte 0
def 13
def 14
dtlb_20 15
-#if 0
naitlb_20 16
-#else
- def 16
-#endif
nadtlb_20 17
def 18
def 19
def 29
def 30
def 31
+END(fault_vector_20)
#ifndef CONFIG_64BIT
- .export fault_vector_11
-
.align 2048
-fault_vector_11:
+ENTRY(fault_vector_11)
/* First vector is invalid (0) */
.ascii "cows can fly"
.byte 0
def 13
def 14
dtlb_11 15
-#if 0
naitlb_11 16
-#else
- def 16
-#endif
nadtlb_11 17
def 18
def 19
def 29
def 30
def 31
+END(fault_vector_11)
#endif
+ /* Fault vector is separately protected and *must* be on its own page */
+ .align PAGE_SIZE
+ENTRY(end_fault_vector)
.import handle_interruption,code
.import do_cpu_irq_mask,code
#define CLONE_VM 0x100 /* Must agree with <linux/sched.h> */
#define CLONE_UNTRACED 0x00800000
- .export __kernel_thread, code
.import do_fork
-__kernel_thread:
+ENTRY(__kernel_thread)
STREG %r2, -RP_OFFSET(%r30)
copy %r30, %r1
ldo -PT_SZ_ALGN(%r30), %r30
bv %r0(%r2)
nop
+ENDPROC(__kernel_thread)
/*
* Child Returns here
* into task save area.
*/
- .export ret_from_kernel_thread
-ret_from_kernel_thread:
+ENTRY(ret_from_kernel_thread)
/* Call schedule_tail first though */
BL schedule_tail, %r2
bv %r0(%r1)
#endif
ldi 0, %r26
+ENDPROC(ret_from_kernel_thread)
.import sys_execve, code
- .export __execve, code
-__execve:
+ENTRY(__execve)
copy %r2, %r15
copy %r30, %r16
ldo PT_SZ_ALGN(%r30), %r30
copy %r16, %r30
bv %r0(%r2)
nop
+ENDPROC(__execve)
- .align 4
/*
* struct task_struct *_switch_to(struct task_struct *prev,
* struct task_struct *next)
*
* switch kernel stacks and return prev */
- .export _switch_to, code
-_switch_to:
+ENTRY(_switch_to)
STREG %r2, -RP_OFFSET(%r30)
callee_save_float
LDREG -RP_OFFSET(%r30), %r2
bv %r0(%r2)
copy %r26, %r28
+ENDPROC(_switch_to)
/*
* Common rfi return path for interruptions, kernel execve, and
*
*/
- .align 4096
+ .align PAGE_SIZE
- .export syscall_exit_rfi
-syscall_exit_rfi:
+ENTRY(syscall_exit_rfi)
mfctl %cr30,%r16
LDREG TI_TASK(%r16), %r16 /* thread_info -> task_struct */
ldo TASK_REGS(%r16),%r16
* (we don't store them in the sigcontext), so set them
* to "proper" values now (otherwise we'll wind up restoring
* whatever was last stored in the task structure, which might
- * be inconsistent if an interrupt occured while on the gateway
- * page) Note that we may be "trashing" values the user put in
- * them, but we don't support the the user changing them.
+ * be inconsistent if an interrupt occurred while on the gateway
+ * page). Note that we may be "trashing" values the user put in
+ * them, but we don't support the user changing them.
*/
STREG %r0,PT_SR2(%r16)
/* NOTE: Need to enable interrupts incase we schedule. */
ssm PSW_SM_I, %r0
- /* Check for software interrupts */
-
- .import irq_stat,data
-
- load32 irq_stat,%r19
-#ifdef CONFIG_SMP
- mfctl %cr30,%r1
- ldw TI_CPU(%r1),%r1 /* get cpu # - int */
- /* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) amount
- ** irq_stat[] is defined using ____cacheline_aligned.
- */
-#ifdef CONFIG_64BIT
- shld %r1, 6, %r20
-#else
- shlw %r1, 5, %r20
-#endif
- add %r19,%r20,%r19 /* now have &irq_stat[smp_processor_id()] */
-#endif /* CONFIG_SMP */
-
- LDREG IRQSTAT_SIRQ_PEND(%r19),%r20 /* hardirq.h: unsigned long */
- cmpib,<>,n 0,%r20,intr_do_softirq /* forward */
-
intr_check_resched:
/* check for reschedule */
LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */
bb,<,n %r19,31-TIF_NEED_RESCHED,intr_do_resched /* forward */
+ .import do_notify_resume,code
intr_check_sig:
/* As above */
mfctl %cr30,%r1
- LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_SIGPENDING */
- bb,<,n %r19, 31-TIF_SIGPENDING, intr_do_signal /* forward */
+ LDREG TI_FLAGS(%r1),%r19
+ ldi (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK|_TIF_NOTIFY_RESUME), %r20
+ and,COND(<>) %r19, %r20, %r0
+ b,n intr_restore /* skip past if we've nothing to do */
+
+ /* This check is critical to having LWS
+ * working. The IASQ is zero on the gateway
+ * page and we cannot deliver any signals until
+ * we get off the gateway page.
+ *
+ * Only do signals if we are returning to user space
+ */
+ LDREG PT_IASQ0(%r16), %r20
+ cmpib,COND(=),n 0,%r20,intr_restore /* backward */
+ LDREG PT_IASQ1(%r16), %r20
+ cmpib,COND(=),n 0,%r20,intr_restore /* backward */
+
+ copy %r0, %r25 /* long in_syscall = 0 */
+#ifdef CONFIG_64BIT
+ ldo -16(%r30),%r29 /* Reference param save area */
+#endif
+
+ BL do_notify_resume,%r2
+ copy %r16, %r26 /* struct pt_regs *regs */
+
+ b,n intr_check_sig
intr_restore:
copy %r16,%r29
rfi
nop
- nop
- nop
- nop
- nop
- nop
- nop
- nop
- .import do_softirq,code
-intr_do_softirq:
- BL do_softirq,%r2
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#else
- nop
-#endif
- b intr_check_resched
- nop
+#ifndef CONFIG_PREEMPT
+# define intr_do_preempt intr_restore
+#endif /* !CONFIG_PREEMPT */
.import schedule,code
intr_do_resched:
- /* Only do reschedule if we are returning to user space */
+ /* Only call schedule on return to userspace. If we're returning
+ * to kernel space, we may schedule if CONFIG_PREEMPT, otherwise
+ * we jump back to intr_restore.
+ */
LDREG PT_IASQ0(%r16), %r20
- CMPIB= 0,%r20,intr_restore /* backward */
+ cmpib,COND(=) 0, %r20, intr_do_preempt
nop
LDREG PT_IASQ1(%r16), %r20
- CMPIB= 0,%r20,intr_restore /* backward */
+ cmpib,COND(=) 0, %r20, intr_do_preempt
nop
#ifdef CONFIG_64BIT
#endif
ldo R%intr_check_sig(%r2), %r2
-
- .import do_signal,code
-intr_do_signal:
- /*
- This check is critical to having LWS
- working. The IASQ is zero on the gateway
- page and we cannot deliver any signals until
- we get off the gateway page.
-
- Only do signals if we are returning to user space
- */
- LDREG PT_IASQ0(%r16), %r20
- CMPIB= 0,%r20,intr_restore /* backward */
- nop
- LDREG PT_IASQ1(%r16), %r20
- CMPIB= 0,%r20,intr_restore /* backward */
+ /* preempt the current task on returning to kernel
+ * mode from an interrupt, iff need_resched is set,
+ * and preempt_count is 0. otherwise, we continue on
+ * our merry way back to the current running task.
+ */
+#ifdef CONFIG_PREEMPT
+ .import preempt_schedule_irq,code
+intr_do_preempt:
+ rsm PSW_SM_I, %r0 /* disable interrupts */
+
+ /* current_thread_info()->preempt_count */
+ mfctl %cr30, %r1
+ LDREG TI_PRE_COUNT(%r1), %r19
+ cmpib,COND(<>) 0, %r19, intr_restore /* if preempt_count > 0 */
+ nop /* prev insn branched backwards */
+
+ /* check if we interrupted a critical path */
+ LDREG PT_PSW(%r16), %r20
+ bb,<,n %r20, 31 - PSW_SM_I, intr_restore
nop
- copy %r0, %r24 /* unsigned long in_syscall */
- copy %r16, %r25 /* struct pt_regs *regs */
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
-
- BL do_signal,%r2
- copy %r0, %r26 /* sigset_t *oldset = NULL */
-
- b intr_check_sig
+ BL preempt_schedule_irq, %r2
nop
+ b,n intr_restore /* ssm PSW_SM_I done by intr_restore */
+#endif /* CONFIG_PREEMPT */
+
/*
* External interrupts.
*/
intr_extint:
- CMPIB=,n 0,%r16,1f
+ cmpib,COND(=),n 0,%r16,1f
+
get_stack_use_cr30
- b,n 3f
+ b,n 2f
1:
-#if 0 /* Interrupt Stack support not working yet! */
- mfctl %cr31,%r1
- copy %r30,%r17
- /* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/
-#ifdef CONFIG_64BIT
- depdi 0,63,15,%r17
-#else
- depi 0,31,15,%r17
-#endif
- CMPB=,n %r1,%r17,2f
- get_stack_use_cr31
- b,n 3f
-#endif
-2:
get_stack_use_r30
-
-3:
+2:
save_specials %r29
virt_map
save_general %r29
b do_cpu_irq_mask
ldo R%intr_return(%r2), %r2 /* return to intr_return, not here */
+ENDPROC(syscall_exit_rfi)
/* Generic interruptions (illegal insn, unaligned, page fault, etc) */
- .export intr_save, code /* for os_hpmc */
-
-intr_save:
+ENTRY(intr_save) /* for os_hpmc */
mfsp %sr7,%r16
- CMPIB=,n 0,%r16,1f
+ cmpib,COND(=),n 0,%r16,1f
get_stack_use_cr30
b 2f
copy %r8,%r26
* adjust isr/ior below.
*/
- CMPIB=,n 6,%r26,skip_save_ior
+ cmpib,COND(=),n 6,%r26,skip_save_ior
mfctl %cr20, %r16 /* isr */
*/
/* adjust isr/ior. */
-
- extrd,u %r16,63,7,%r1 /* get high bits from isr for ior */
- depd %r1,31,7,%r17 /* deposit them into ior */
- depdi 0,63,7,%r16 /* clear them from isr */
+ extrd,u %r16,63,SPACEID_SHIFT,%r1 /* get high bits from isr for ior */
+ depd %r1,31,SPACEID_SHIFT,%r17 /* deposit them into ior */
+ depdi 0,63,SPACEID_SHIFT,%r16 /* clear them from isr */
#endif
STREG %r16, PT_ISR(%r29)
STREG %r17, PT_IOR(%r29)
b handle_interruption
ldo R%intr_check_sig(%r2), %r2
+ENDPROC(intr_save)
/*
*/
t0 = r1 /* temporary register 0 */
- va = r8 /* virtual address for which the trap occured */
+ va = r8 /* virtual address for which the trap occurred */
t1 = r9 /* temporary register 1 */
pte = r16 /* pte/phys page # */
prot = r17 /* prot bits */
- spc = r24 /* space for which the trap occured */
+ spc = r24 /* space for which the trap occurred */
ptp = r25 /* page directory/page table pointer */
#ifdef CONFIG_64BIT
get_pgd spc,ptp
space_check spc,t0,nadtlb_fault
- L3_ptep ptp,pte,t0,va,nadtlb_check_flush_20w
+ L3_ptep ptp,pte,t0,va,nadtlb_check_alias_20w
update_ptep ptp,pte,t0,t1
rfir
nop
-nadtlb_check_flush_20w:
- bb,>=,n pte,_PAGE_FLUSH_BIT,nadtlb_emulate
-
- /* Insert a "flush only" translation */
+nadtlb_check_alias_20w:
+ do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate
- depdi,z 7,7,3,prot
- depdi 1,10,1,prot
-
- /* Get rid of prot bits and convert to page addr for idtlbt */
-
- depdi 0,63,12,pte
- extrd,u pte,56,52,pte
idtlbt pte,prot
rfir
nop
dtlb_check_alias_11:
-
- /* Check to see if fault is in the temporary alias region */
-
- cmpib,<>,n 0,spc,dtlb_fault /* forward */
- ldil L%(TMPALIAS_MAP_START),t0
- copy va,t1
- depwi 0,31,23,t1
- cmpb,<>,n t0,t1,dtlb_fault /* forward */
- ldi (_PAGE_DIRTY|_PAGE_WRITE|_PAGE_READ),prot
- depw,z prot,8,7,prot
-
- /*
- * OK, it is in the temp alias region, check whether "from" or "to".
- * Check "subtle" note in pacache.S re: r23/r26.
- */
-
- extrw,u,= va,9,1,r0
- or,tr %r23,%r0,pte /* If "from" use "from" page */
- or %r26,%r0,pte /* else "to", use "to" page */
+ do_alias spc,t0,t1,va,pte,prot,dtlb_fault
idtlba pte,(va)
idtlbp prot,(va)
space_check spc,t0,nadtlb_fault
- L2_ptep ptp,pte,t0,va,nadtlb_check_flush_11
+ L2_ptep ptp,pte,t0,va,nadtlb_check_alias_11
update_ptep ptp,pte,t0,t1
rfir
nop
-nadtlb_check_flush_11:
- bb,>=,n pte,_PAGE_FLUSH_BIT,nadtlb_emulate
-
- /* Insert a "flush only" translation */
-
- zdepi 7,7,3,prot
- depi 1,10,1,prot
+nadtlb_check_alias_11:
+ do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate
- /* Get rid of prot bits and convert to page addr for idtlba */
-
- depi 0,31,12,pte
- extru pte,24,25,pte
-
- mfsp %sr1,t0 /* Save sr1 so we can use it in tlb inserts */
- mtsp spc,%sr1
-
- idtlba pte,(%sr1,va)
- idtlbp prot,(%sr1,va)
-
- mtsp t0, %sr1 /* Restore sr1 */
+ idtlba pte,(va)
+ idtlbp prot,(va)
rfir
nop
space_check spc,t0,nadtlb_fault
- L2_ptep ptp,pte,t0,va,nadtlb_check_flush_20
+ L2_ptep ptp,pte,t0,va,nadtlb_check_alias_20
update_ptep ptp,pte,t0,t1
rfir
nop
-nadtlb_check_flush_20:
- bb,>=,n pte,_PAGE_FLUSH_BIT,nadtlb_emulate
-
- /* Insert a "flush only" translation */
-
- depdi,z 7,7,3,prot
- depdi 1,10,1,prot
-
- /* Get rid of prot bits and convert to page addr for idtlbt */
+nadtlb_check_alias_20:
+ do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate
- depdi 0,63,12,pte
- extrd,u pte,56,32,pte
idtlbt pte,prot
rfir
nop
+
#endif
nadtlb_emulate:
bb,>=,n %r9,26,nadtlb_nullify /* m bit not set, just nullify */
BL get_register,%r25
extrw,u %r9,15,5,%r8 /* Get index register # */
- CMPIB=,n -1,%r1,nadtlb_fault /* have to use slow path */
+ cmpib,COND(=),n -1,%r1,nadtlb_fault /* have to use slow path */
copy %r1,%r24
BL get_register,%r25
extrw,u %r9,10,5,%r8 /* Get base register # */
- CMPIB=,n -1,%r1,nadtlb_fault /* have to use slow path */
+ cmpib,COND(=),n -1,%r1,nadtlb_fault /* have to use slow path */
BL set_register,%r25
add,l %r1,%r24,%r1 /* doesn't affect c/b bits */
cmpb,<>,n %r16,%r17,nadtlb_fault /* Must be probe,[rw]*/
BL get_register,%r25 /* Find the target register */
extrw,u %r9,31,5,%r8 /* Get target register */
- CMPIB=,n -1,%r1,nadtlb_fault /* have to use slow path */
+ cmpib,COND(=),n -1,%r1,nadtlb_fault /* have to use slow path */
BL set_register,%r25
copy %r0,%r1 /* Write zero to target register */
b nadtlb_nullify /* Nullify return insn */
rfir
nop
+naitlb_miss_20w:
+
+ /*
+ * I miss is a little different, since we allow users to fault
+ * on the gateway page which is in the kernel address space.
+ */
+
+ space_adjust spc,va,t0
+ get_pgd spc,ptp
+ space_check spc,t0,naitlb_fault
+
+ L3_ptep ptp,pte,t0,va,naitlb_check_alias_20w
+
+ update_ptep ptp,pte,t0,t1
+
+ make_insert_tlb spc,pte,prot
+
+ iitlbt pte,prot
+
+ rfir
+ nop
+
+naitlb_check_alias_20w:
+ do_alias spc,t0,t1,va,pte,prot,naitlb_fault
+
+ iitlbt pte,prot
+
+ rfir
+ nop
+
#else
itlb_miss_11:
rfir
nop
+naitlb_miss_11:
+ get_pgd spc,ptp
+
+ space_check spc,t0,naitlb_fault
+
+ L2_ptep ptp,pte,t0,va,naitlb_check_alias_11
+
+ update_ptep ptp,pte,t0,t1
+
+ make_insert_tlb_11 spc,pte,prot
+
+ mfsp %sr1,t0 /* Save sr1 so we can use it in tlb inserts */
+ mtsp spc,%sr1
+
+ iitlba pte,(%sr1,va)
+ iitlbp prot,(%sr1,va)
+
+ mtsp t0, %sr1 /* Restore sr1 */
+
+ rfir
+ nop
+
+naitlb_check_alias_11:
+ do_alias spc,t0,t1,va,pte,prot,itlb_fault
+
+ iitlba pte,(%sr0, va)
+ iitlbp prot,(%sr0, va)
+
+ rfir
+ nop
+
+
itlb_miss_20:
get_pgd spc,ptp
rfir
nop
+naitlb_miss_20:
+ get_pgd spc,ptp
+
+ space_check spc,t0,naitlb_fault
+
+ L2_ptep ptp,pte,t0,va,naitlb_check_alias_20
+
+ update_ptep ptp,pte,t0,t1
+
+ make_insert_tlb spc,pte,prot
+
+ f_extend pte,t0
+
+ iitlbt pte,prot
+
+ rfir
+ nop
+
+naitlb_check_alias_20:
+ do_alias spc,t0,t1,va,pte,prot,naitlb_fault
+
+ iitlbt pte,prot
+
+ rfir
+ nop
+
#endif
#ifdef CONFIG_64BIT
L3_ptep ptp,pte,t0,va,dbit_fault
#ifdef CONFIG_SMP
- CMPIB=,n 0,spc,dbit_nolock_20w
+ cmpib,COND(=),n 0,spc,dbit_nolock_20w
load32 PA(pa_dbit_lock),t0
dbit_spin_20w:
- ldcw 0(t0),t1
- cmpib,= 0,t1,dbit_spin_20w
+ LDCW 0(t0),t1
+ cmpib,COND(=) 0,t1,dbit_spin_20w
nop
dbit_nolock_20w:
idtlbt pte,prot
#ifdef CONFIG_SMP
- CMPIB=,n 0,spc,dbit_nounlock_20w
+ cmpib,COND(=),n 0,spc,dbit_nounlock_20w
ldi 1,t1
stw t1,0(t0)
L2_ptep ptp,pte,t0,va,dbit_fault
#ifdef CONFIG_SMP
- CMPIB=,n 0,spc,dbit_nolock_11
+ cmpib,COND(=),n 0,spc,dbit_nolock_11
load32 PA(pa_dbit_lock),t0
dbit_spin_11:
- ldcw 0(t0),t1
+ LDCW 0(t0),t1
cmpib,= 0,t1,dbit_spin_11
nop
mtsp t1, %sr1 /* Restore sr1 */
#ifdef CONFIG_SMP
- CMPIB=,n 0,spc,dbit_nounlock_11
+ cmpib,COND(=),n 0,spc,dbit_nounlock_11
ldi 1,t1
stw t1,0(t0)
L2_ptep ptp,pte,t0,va,dbit_fault
#ifdef CONFIG_SMP
- CMPIB=,n 0,spc,dbit_nolock_20
+ cmpib,COND(=),n 0,spc,dbit_nolock_20
load32 PA(pa_dbit_lock),t0
dbit_spin_20:
- ldcw 0(t0),t1
+ LDCW 0(t0),t1
cmpib,= 0,t1,dbit_spin_20
nop
idtlbt pte,prot
#ifdef CONFIG_SMP
- CMPIB=,n 0,spc,dbit_nounlock_20
+ cmpib,COND(=),n 0,spc,dbit_nounlock_20
ldi 1,t1
stw t1,0(t0)
b intr_save
ldi 17,%r8
+naitlb_fault:
+ b intr_save
+ ldi 16,%r8
+
dtlb_fault:
b intr_save
ldi 15,%r8
LDREG PT_GR18(\regs),%r18
.endm
- .export sys_fork_wrapper
- .export child_return
-sys_fork_wrapper:
+ENTRY(sys_fork_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
ldo TASK_REGS(%r1),%r1
reg_save %r1
ldi __NR_fork,%r20
bv %r0(%r2)
STREG %r20,PT_GR20(%r1)
+ENDPROC(sys_fork_wrapper)
/* Set the return value for the child */
-child_return:
+ENTRY(child_return)
BL schedule_tail, %r2
nop
LDREG TASK_PT_GR19(%r1),%r2
b wrapper_exit
copy %r0,%r28
+ENDPROC(child_return)
-
- .export sys_clone_wrapper
-sys_clone_wrapper:
+
+ENTRY(sys_clone_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
ldo TASK_REGS(%r1),%r1 /* get pt regs */
reg_save %r1
ldo -16(%r30),%r29 /* Reference param save area */
#endif
+ /* WARNING - Clobbers r19 and r21, userspace must save these! */
STREG %r2,PT_GR19(%r1) /* save for child */
STREG %r30,PT_GR21(%r1)
BL sys_clone,%r2
b wrapper_exit
LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
+ENDPROC(sys_clone_wrapper)
+
- .export sys_vfork_wrapper
-sys_vfork_wrapper:
+ENTRY(sys_vfork_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
ldo TASK_REGS(%r1),%r1 /* get pt regs */
reg_save %r1
b wrapper_exit
LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
+ENDPROC(sys_vfork_wrapper)
.macro execve_wrapper execve
nop
.endm
- .export sys_execve_wrapper
.import sys_execve
-
-sys_execve_wrapper:
+ENTRY(sys_execve_wrapper)
execve_wrapper sys_execve
+ENDPROC(sys_execve_wrapper)
#ifdef CONFIG_64BIT
- .export sys32_execve_wrapper
.import sys32_execve
-
-sys32_execve_wrapper:
+ENTRY(sys32_execve_wrapper)
execve_wrapper sys32_execve
+ENDPROC(sys32_execve_wrapper)
#endif
- .export sys_rt_sigreturn_wrapper
-sys_rt_sigreturn_wrapper:
+ENTRY(sys_rt_sigreturn_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
ldo TASK_REGS(%r26),%r26 /* get pt regs */
/* Don't save regs, we are going to restore them from sigcontext. */
*/
bv %r0(%r2)
LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */
+ENDPROC(sys_rt_sigreturn_wrapper)
- .export sys_sigaltstack_wrapper
-sys_sigaltstack_wrapper:
+ENTRY(sys_sigaltstack_wrapper)
/* Get the user stack pointer */
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
ldo TASK_REGS(%r1),%r24 /* get pt regs */
STREG %r2, -RP_OFFSET(%r30)
#ifdef CONFIG_64BIT
ldo FRAME_SIZE(%r30), %r30
- b,l do_sigaltstack,%r2
+ BL do_sigaltstack,%r2
ldo -16(%r30),%r29 /* Reference param save area */
#else
- bl do_sigaltstack,%r2
+ BL do_sigaltstack,%r2
ldo FRAME_SIZE(%r30), %r30
#endif
LDREG -RP_OFFSET(%r30), %r2
bv %r0(%r2)
nop
+ENDPROC(sys_sigaltstack_wrapper)
#ifdef CONFIG_64BIT
- .export sys32_sigaltstack_wrapper
-sys32_sigaltstack_wrapper:
+ENTRY(sys32_sigaltstack_wrapper)
/* Get the user stack pointer */
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24
LDREG TASK_PT_GR30(%r24),%r24
STREG %r2, -RP_OFFSET(%r30)
ldo FRAME_SIZE(%r30), %r30
- b,l do_sigaltstack32,%r2
+ BL do_sigaltstack32,%r2
ldo -16(%r30),%r29 /* Reference param save area */
ldo -FRAME_SIZE(%r30), %r30
LDREG -RP_OFFSET(%r30), %r2
bv %r0(%r2)
nop
+ENDPROC(sys32_sigaltstack_wrapper)
#endif
- .export sys_rt_sigsuspend_wrapper
-sys_rt_sigsuspend_wrapper:
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
- ldo TASK_REGS(%r1),%r24
- reg_save %r24
-
- STREG %r2, -RP_OFFSET(%r30)
-#ifdef CONFIG_64BIT
- ldo FRAME_SIZE(%r30), %r30
- b,l sys_rt_sigsuspend,%r2
- ldo -16(%r30),%r29 /* Reference param save area */
-#else
- bl sys_rt_sigsuspend,%r2
- ldo FRAME_SIZE(%r30), %r30
-#endif
-
- ldo -FRAME_SIZE(%r30), %r30
- LDREG -RP_OFFSET(%r30), %r2
-
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
- ldo TASK_REGS(%r1),%r1
- reg_restore %r1
-
- bv %r0(%r2)
- nop
-
- .export syscall_exit
-syscall_exit:
-
+ENTRY(syscall_exit)
/* NOTE: HP-UX syscalls also come through here
* after hpux_syscall_exit fixes up return
* values. */
STREG %r28,TASK_PT_GR28(%r1)
#ifdef CONFIG_HPUX
-
/* <linux/personality.h> cannot be easily included */
#define PER_HPUX 0x10
- LDREG TASK_PERSONALITY(%r1),%r19
+ ldw TASK_PERSONALITY(%r1),%r19
/* We can't use "CMPIB<> PER_HPUX" since "im5" field is sign extended */
ldo -PER_HPUX(%r19), %r19
- CMPIB<>,n 0,%r19,1f
+ cmpib,COND(<>),n 0,%r19,1f
/* Save other hpux returns if personality is PER_HPUX */
STREG %r22,TASK_PT_GR22(%r1)
*/
loadgp
-syscall_check_bh:
+syscall_check_resched:
- /* Check for software interrupts */
+ /* check for reschedule */
- .import irq_stat,data
+ LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 /* long */
+ bb,<,n %r19, 31-TIF_NEED_RESCHED, syscall_do_resched /* forward */
- load32 irq_stat,%r19
+ .import do_signal,code
+syscall_check_sig:
+ LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19
+ ldi (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK), %r26
+ and,COND(<>) %r19, %r26, %r0
+ b,n syscall_restore /* skip past if we've nothing to do */
-#ifdef CONFIG_SMP
- /* sched.h: int processor */
- /* %r26 is used as scratch register to index into irq_stat[] */
- ldw TI_CPU-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 /* cpu # */
+syscall_do_signal:
+ /* Save callee-save registers (for sigcontext).
+ * FIXME: After this point the process structure should be
+ * consistent with all the relevant state of the process
+ * before the syscall. We need to verify this.
+ */
+ LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
+ ldo TASK_REGS(%r1), %r26 /* struct pt_regs *regs */
+ reg_save %r26
- /* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) bits */
#ifdef CONFIG_64BIT
- shld %r26, 6, %r20
-#else
- shlw %r26, 5, %r20
+ ldo -16(%r30),%r29 /* Reference param save area */
#endif
- add %r19,%r20,%r19 /* now have &irq_stat[smp_processor_id()] */
-#endif /* CONFIG_SMP */
- LDREG IRQSTAT_SIRQ_PEND(%r19),%r20 /* hardirq.h: unsigned long */
- cmpib,<>,n 0,%r20,syscall_do_softirq /* forward */
-
-syscall_check_resched:
+ BL do_notify_resume,%r2
+ ldi 1, %r25 /* long in_syscall = 1 */
- /* check for reschedule */
-
- LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 /* long */
- bb,<,n %r19, 31-TIF_NEED_RESCHED, syscall_do_resched /* forward */
+ LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
+ ldo TASK_REGS(%r1), %r20 /* reload pt_regs */
+ reg_restore %r20
-syscall_check_sig:
- LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 /* get ti flags */
- bb,<,n %r19, 31-TIF_SIGPENDING, syscall_do_signal /* forward */
+ b,n syscall_check_sig
syscall_restore:
- /* Are we being ptraced? */
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- LDREG TASK_PTRACE(%r1), %r19
- bb,< %r19,31,syscall_restore_rfi
- nop
+ /* Are we being ptraced? */
+ ldw TASK_FLAGS(%r1),%r19
+ ldi (_TIF_SINGLESTEP|_TIF_BLOCKSTEP),%r2
+ and,COND(=) %r19,%r2,%r0
+ b,n syscall_restore_rfi
ldo TASK_PT_FR31(%r1),%r19 /* reload fpregs */
rest_fp %r19
LDREG TASK_PT_GR31(%r1),%r31 /* restore syscall rp */
/* NOTE: We use rsm/ssm pair to make this operation atomic */
+ LDREG TASK_PT_GR30(%r1),%r1 /* Get user sp */
rsm PSW_SM_I, %r0
- LDREG TASK_PT_GR30(%r1),%r30 /* restore user sp */
- mfsp %sr3,%r1 /* Get users space id */
+ copy %r1,%r30 /* Restore user sp */
+ mfsp %sr3,%r1 /* Get user space id */
mtsp %r1,%sr7 /* Restore sr7 */
ssm PSW_SM_I, %r0
ldi 0x0b,%r20 /* Create new PSW */
depi -1,13,1,%r20 /* C, Q, D, and I bits */
- /* The values of PA_SINGLESTEP_BIT and PA_BLOCKSTEP_BIT are
- * set in include/linux/ptrace.h and converted to PA bitmap
+ /* The values of SINGLESTEP_BIT and BLOCKSTEP_BIT are
+ * set in thread_info.h and converted to PA bitmap
* numbers in asm-offsets.c */
- /* if ((%r19.PA_SINGLESTEP_BIT)) { %r20.27=1} */
- extru,= %r19,PA_SINGLESTEP_BIT,1,%r0
+ /* if ((%r19.SINGLESTEP_BIT)) { %r20.27=1} */
+ extru,= %r19,TIF_SINGLESTEP_PA_BIT,1,%r0
depi -1,27,1,%r20 /* R bit */
- /* if ((%r19.PA_BLOCKSTEP_BIT)) { %r20.7=1} */
- extru,= %r19,PA_BLOCKSTEP_BIT,1,%r0
+ /* if ((%r19.BLOCKSTEP_BIT)) { %r20.7=1} */
+ extru,= %r19,TIF_BLOCKSTEP_PA_BIT,1,%r0
depi -1,7,1,%r20 /* T bit */
STREG %r20,TASK_PT_PSW(%r1)
b intr_restore
nop
- .import do_softirq,code
-syscall_do_softirq:
- BL do_softirq,%r2
- nop
- /* NOTE: We enable I-bit incase we schedule later,
- * and we might be going back to userspace if we were
- * traced. */
- b syscall_check_resched
- ssm PSW_SM_I, %r0 /* do_softirq returns with I bit off */
-
.import schedule,code
syscall_do_resched:
BL schedule,%r2
#else
nop
#endif
- b syscall_check_bh /* if resched, we start over again */
+ b syscall_check_resched /* if resched, we start over again */
nop
+ENDPROC(syscall_exit)
- .import do_signal,code
-syscall_do_signal:
- /* Save callee-save registers (for sigcontext).
- FIXME: After this point the process structure should be
- consistent with all the relevant state of the process
- before the syscall. We need to verify this. */
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- ldo TASK_REGS(%r1), %r25 /* struct pt_regs *regs */
- reg_save %r25
-
- ldi 1, %r24 /* unsigned long in_syscall */
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
- BL do_signal,%r2
- copy %r0, %r26 /* sigset_t *oldset = NULL */
+#ifdef CONFIG_FUNCTION_TRACER
+ .import ftrace_function_trampoline,code
+ENTRY(_mcount)
+ copy %r3, %arg2
+ b ftrace_function_trampoline
+ nop
+ENDPROC(_mcount)
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- ldo TASK_REGS(%r1), %r20 /* reload pt_regs */
- reg_restore %r20
+ENTRY(return_to_handler)
+ load32 return_trampoline, %rp
+ copy %ret0, %arg0
+ copy %ret1, %arg1
+ b ftrace_return_to_handler
+ nop
+return_trampoline:
+ copy %ret0, %rp
+ copy %r23, %ret0
+ copy %r24, %ret1
+
+.globl ftrace_stub
+ftrace_stub:
+ bv %r0(%rp)
+ nop
+ENDPROC(return_to_handler)
+#endif /* CONFIG_FUNCTION_TRACER */
- b,n syscall_check_sig
+get_register:
/*
* get_register is used by the non access tlb miss handlers to
* copy the value of the general register specified in r8 into
* a -1 in it, but that is OK, it just means that we will have
* to use the slow path instead).
*/
-
-get_register:
blr %r8,%r0
nop
bv %r0(%r25) /* r0 */
bv %r0(%r25) /* r31 */
copy %r31,%r1
+
+set_register:
/*
* set_register is used by the non access tlb miss handlers to
* copy the value of r1 into the general register specified in
* r8.
*/
-
-set_register:
blr %r8,%r0
nop
bv %r0(%r25) /* r0 (silly, but it is a place holder) */
copy %r1,%r30
bv %r0(%r25) /* r31 */
copy %r1,%r31
+
projects / linux-flexiantxendom0-3.2.10.git / blobdiff