/*
- * arch/powerpc/kernel/misc64.S
- *
* This file contains miscellaneous low-level functions.
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
* and Paul Mackerras.
* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
- * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
- *
+ * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
+ *
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
*
*/
-#include <linux/config.h>
#include <linux/sys.h>
#include <asm/unistd.h>
#include <asm/errno.h>
.text
-/*
- * Returns (address we are running at) - (address we were linked at)
- * for use before the text and data are mapped to KERNELBASE.
- */
-
-_GLOBAL(reloc_offset)
- mflr r0
- bl 1f
-1: mflr r3
- LOAD_REG_IMMEDIATE(r4,1b)
- subf r3,r4,r3
- mtlr r0
- blr
-
-/*
- * add_reloc_offset(x) returns x + reloc_offset().
- */
-_GLOBAL(add_reloc_offset)
- mflr r0
- bl 1f
-1: mflr r5
- LOAD_REG_IMMEDIATE(r4,1b)
- subf r5,r4,r5
- add r3,r3,r5
- mtlr r0
- blr
-
_GLOBAL(get_msr)
mfmsr r3
blr
-_GLOBAL(get_dar)
- mfdar r3
- blr
-
_GLOBAL(get_srr0)
mfsrr0 r3
blr
_GLOBAL(get_srr1)
mfsrr1 r3
blr
-
-_GLOBAL(get_sp)
- mr r3,r1
- blr
#ifdef CONFIG_IRQSTACKS
_GLOBAL(call_do_softirq)
mtlr r0
blr
-_GLOBAL(call___do_IRQ)
+_GLOBAL(call_handle_irq)
+ ld r8,0(r6)
mflr r0
std r0,16(r1)
+ mtctr r8
stdu r1,THREAD_SIZE-112(r5)
mr r1,r5
- bl .__do_IRQ
+ bctrl
ld r1,0(r1)
ld r0,16(r1)
mtlr r0
blr
#endif /* CONFIG_IRQSTACKS */
- /*
- * To be called by C code which needs to do some operations with MMU
- * disabled. Note that interrupts have to be disabled by the caller
- * prior to calling us. The code called _MUST_ be in the RMO of course
- * and part of the linear mapping as we don't attempt to translate the
- * stack pointer at all. The function is called with the stack switched
- * to this CPU emergency stack
- *
- * prototype is void *call_with_mmu_off(void *func, void *data);
- *
- * the called function is expected to be of the form
- *
- * void *called(void *data);
- */
-_GLOBAL(call_with_mmu_off)
- mflr r0 /* get link, save it on stackframe */
- std r0,16(r1)
- mr r1,r5 /* save old stack ptr */
- ld r1,PACAEMERGSP(r13) /* get emerg. stack */
- subi r1,r1,STACK_FRAME_OVERHEAD
- std r0,16(r1) /* save link on emerg. stack */
- std r5,0(r1) /* save old stack ptr in backchain */
- ld r3,0(r3) /* get to real function ptr (assume same TOC) */
- bl 2f /* we need LR to return, continue at label 2 */
-
- ld r0,16(r1) /* we return here from the call, get LR and */
- ld r1,0(r1) /* .. old stack ptr */
- mtspr SPRN_SRR0,r0 /* and get back to virtual mode with these */
- mfmsr r4
- ori r4,r4,MSR_IR|MSR_DR
- mtspr SPRN_SRR1,r4
- rfid
-
-2: mtspr SPRN_SRR0,r3 /* coming from above, enter real mode */
- mr r3,r4 /* get parameter */
- mfmsr r0
- ori r0,r0,MSR_IR|MSR_DR
- xori r0,r0,MSR_IR|MSR_DR
- mtspr SPRN_SRR1,r0
- rfid
-
-
.section ".toc","aw"
PPC64_CACHES:
.tc ppc64_caches[TC],ppc64_caches
bdnz 1b
isync
blr
-
-/*
- * I/O string operations
- *
- * insb(port, buf, len)
- * outsb(port, buf, len)
- * insw(port, buf, len)
- * outsw(port, buf, len)
- * insl(port, buf, len)
- * outsl(port, buf, len)
- * insw_ns(port, buf, len)
- * outsw_ns(port, buf, len)
- * insl_ns(port, buf, len)
- * outsl_ns(port, buf, len)
- *
- * The *_ns versions don't do byte-swapping.
- */
-_GLOBAL(_insb)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,1
- blelr-
-00: lbz r5,0(r3)
- eieio
- stbu r5,1(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-_GLOBAL(_outsb)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,1
- blelr-
-00: lbzu r5,1(r4)
- stb r5,0(r3)
- bdnz 00b
- sync
- blr
-
-_GLOBAL(_insw)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhbrx r5,0,r3
- eieio
- sthu r5,2(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsw)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhzu r5,2(r4)
- sthbrx r5,0,r3
- bdnz 00b
- sync
- blr
-
-_GLOBAL(_insl)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwbrx r5,0,r3
- eieio
- stwu r5,4(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsl)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwzu r5,4(r4)
- stwbrx r5,0,r3
- bdnz 00b
- sync
- blr
-
-/* _GLOBAL(ide_insw) now in drivers/ide/ide-iops.c */
-_GLOBAL(_insw_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhz r5,0(r3)
- eieio
- sthu r5,2(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-/* _GLOBAL(ide_outsw) now in drivers/ide/ide-iops.c */
-_GLOBAL(_outsw_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhzu r5,2(r4)
- sth r5,0(r3)
- bdnz 00b
- sync
- blr
-
-_GLOBAL(_insl_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwz r5,0(r3)
- eieio
- stwu r5,4(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsl_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwzu r5,4(r4)
- stw r5,0(r3)
- bdnz 00b
- sync
- blr
-
-/*
- * identify_cpu and calls setup_cpu
- * In: r3 = base of the cpu_specs array
- * r4 = address of cur_cpu_spec
- * r5 = relocation offset
- */
-_GLOBAL(identify_cpu)
- mfpvr r7
-1:
- lwz r8,CPU_SPEC_PVR_MASK(r3)
- and r8,r8,r7
- lwz r9,CPU_SPEC_PVR_VALUE(r3)
- cmplw 0,r9,r8
- beq 1f
- addi r3,r3,CPU_SPEC_ENTRY_SIZE
- b 1b
-1:
- sub r0,r3,r5
- std r0,0(r4)
- ld r4,CPU_SPEC_SETUP(r3)
- add r4,r4,r5
- ld r4,0(r4)
- add r4,r4,r5
- mtctr r4
- /* Calling convention for cpu setup is r3=offset, r4=cur_cpu_spec */
- mr r4,r3
- mr r3,r5
- bctr
-
-/*
- * do_cpu_ftr_fixups - goes through the list of CPU feature fixups
- * and writes nop's over sections of code that don't apply for this cpu.
- * r3 = data offset (not changed)
- */
-_GLOBAL(do_cpu_ftr_fixups)
- /* Get CPU 0 features */
- LOAD_REG_IMMEDIATE(r6,cur_cpu_spec)
- sub r6,r6,r3
- ld r4,0(r6)
- sub r4,r4,r3
- ld r4,CPU_SPEC_FEATURES(r4)
- /* Get the fixup table */
- LOAD_REG_IMMEDIATE(r6,__start___ftr_fixup)
- sub r6,r6,r3
- LOAD_REG_IMMEDIATE(r7,__stop___ftr_fixup)
- sub r7,r7,r3
- /* Do the fixup */
-1: cmpld r6,r7
- bgelr
- addi r6,r6,32
- ld r8,-32(r6) /* mask */
- and r8,r8,r4
- ld r9,-24(r6) /* value */
- cmpld r8,r9
- beq 1b
- ld r8,-16(r6) /* section begin */
- ld r9,-8(r6) /* section end */
- subf. r9,r8,r9
- beq 1b
- /* write nops over the section of code */
- /* todo: if large section, add a branch at the start of it */
- srwi r9,r9,2
- mtctr r9
- sub r8,r8,r3
- lis r0,0x60000000@h /* nop */
-3: stw r0,0(r8)
- andi. r10,r4,CPU_FTR_SPLIT_ID_CACHE@l
- beq 2f
- dcbst 0,r8 /* suboptimal, but simpler */
- sync
- icbi 0,r8
-2: addi r8,r8,4
- bdnz 3b
- sync /* additional sync needed on g4 */
- isync
- b 1b
#if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE)
/*
blr
#endif /* defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE) */
+#ifdef CONFIG_CPU_FREQ_PMAC64
/*
* SCOM access functions for 970 (FX only for now)
*
/* restore interrupts */
mtmsrd r5,1
blr
+#endif /* CONFIG_CPU_FREQ_PMAC64 */
/*
mr r29,r3
mr r30,r4
ori r3,r5,CLONE_VM /* flags */
- oris r3,r3,(CLONE_UNTRACED>>16)
+ oris r3,r3,(CLONE_UNTRACED|CLONE_KTHREAD)>>16
li r4,0 /* new sp (unused) */
li r0,__NR_clone
sc
#endif /* CONFIG_ALTIVEC */
-_GLOBAL(__setup_cpu_power3)
- blr
-
-_GLOBAL(execve)
+_GLOBAL(kernel_execve)
li r0,__NR_execve
sc
bnslr
/* clear out hardware hash page table and tlb */
ld r5,0(r27) /* deref function descriptor */
mtctr r5
- bctrl /* ppc_md.hash_clear_all(void); */
+ bctrl /* ppc_md.hpte_clear_all(void); */
/*
* kexec image calling is:
git://git.onelab.eu / linux-2.6.git / blobdiff