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sparc32: introduce run-time patching of srmmu access functions
LEON uses a different ASI than SUN for MMUREGS Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Daniel Hellstrom <daniel@gaisler.com> Cc: Konrad Eisele <konrad@gaisler.com>
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parent
1ec8cf6233
commit
6729cf7967
3 changed files with 90 additions and 61 deletions
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@ -149,67 +149,13 @@ extern void *srmmu_nocache_pool;
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#define __nocache_fix(VADDR) __va(__nocache_pa(VADDR))
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/* Accessing the MMU control register. */
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static inline unsigned int srmmu_get_mmureg(void)
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{
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unsigned int retval;
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__asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
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"=r" (retval) :
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"i" (ASI_M_MMUREGS));
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return retval;
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}
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static inline void srmmu_set_mmureg(unsigned long regval)
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{
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__asm__ __volatile__("sta %0, [%%g0] %1\n\t" : :
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"r" (regval), "i" (ASI_M_MMUREGS) : "memory");
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}
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static inline void srmmu_set_ctable_ptr(unsigned long paddr)
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{
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paddr = ((paddr >> 4) & SRMMU_CTX_PMASK);
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__asm__ __volatile__("sta %0, [%1] %2\n\t" : :
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"r" (paddr), "r" (SRMMU_CTXTBL_PTR),
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"i" (ASI_M_MMUREGS) :
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"memory");
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}
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static inline void srmmu_set_context(int context)
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{
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__asm__ __volatile__("sta %0, [%1] %2\n\t" : :
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"r" (context), "r" (SRMMU_CTX_REG),
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"i" (ASI_M_MMUREGS) : "memory");
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}
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static inline int srmmu_get_context(void)
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{
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register int retval;
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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"=r" (retval) :
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"r" (SRMMU_CTX_REG),
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"i" (ASI_M_MMUREGS));
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return retval;
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}
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static inline unsigned int srmmu_get_fstatus(void)
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{
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unsigned int retval;
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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"=r" (retval) :
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"r" (SRMMU_FAULT_STATUS), "i" (ASI_M_MMUREGS));
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return retval;
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}
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static inline unsigned int srmmu_get_faddr(void)
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{
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unsigned int retval;
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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"=r" (retval) :
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"r" (SRMMU_FAULT_ADDR), "i" (ASI_M_MMUREGS));
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return retval;
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}
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unsigned int srmmu_get_mmureg(void);
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void srmmu_set_mmureg(unsigned long regval);
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void srmmu_set_ctable_ptr(unsigned long paddr);
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void srmmu_set_context(int context);
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int srmmu_get_context(void);
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unsigned int srmmu_get_fstatus(void);
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unsigned int srmmu_get_faddr(void);
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/* This is guaranteed on all SRMMU's. */
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static inline void srmmu_flush_whole_tlb(void)
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@ -8,6 +8,7 @@ obj-$(CONFIG_SPARC64) += ultra.o tlb.o tsb.o gup.o
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obj-y += fault_$(BITS).o
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obj-y += init_$(BITS).o
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obj-$(CONFIG_SPARC32) += extable.o srmmu.o iommu.o io-unit.o
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obj-$(CONFIG_SPARC32) += srmmu_access.o
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obj-$(CONFIG_SPARC32) += hypersparc.o viking.o tsunami.o swift.o
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obj-$(CONFIG_SPARC32) += leon_mm.o
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82
arch/sparc/mm/srmmu_access.S
Normal file
82
arch/sparc/mm/srmmu_access.S
Normal file
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@ -0,0 +1,82 @@
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/* Assembler variants of srmmu access functions.
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* Implemented in assembler to allow run-time patching.
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* LEON uses a different ASI for MMUREGS than SUN.
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*
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* The leon_1insn_patch infrastructure is used
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* for the run-time patching.
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*/
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#include <linux/linkage.h>
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#include <asm/asmmacro.h>
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#include <asm/pgtsrmmu.h>
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#include <asm/asi.h>
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/* unsigned int srmmu_get_mmureg(void) */
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ENTRY(srmmu_get_mmureg)
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LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0)
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SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0)
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retl
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nop
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ENDPROC(srmmu_get_mmureg)
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/* void srmmu_set_mmureg(unsigned long regval) */
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ENTRY(srmmu_set_mmureg)
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LEON_PI(sta %o0, [%g0] ASI_LEON_MMUREGS)
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SUN_PI_(sta %o0, [%g0] ASI_M_MMUREGS)
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retl
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nop
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ENDPROC(srmmu_set_mmureg)
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/* void srmmu_set_ctable_ptr(unsigned long paddr) */
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ENTRY(srmmu_set_ctable_ptr)
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/* paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); */
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srl %o0, 4, %g1
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and %g1, SRMMU_CTX_PMASK, %g1
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mov SRMMU_CTXTBL_PTR, %g2
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LEON_PI(sta %g1, [%g2] ASI_LEON_MMUREGS)
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SUN_PI_(sta %g1, [%g2] ASI_M_MMUREGS)
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retl
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nop
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ENDPROC(srmmu_set_ctable_ptr)
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/* void srmmu_set_context(int context) */
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ENTRY(srmmu_set_context)
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mov SRMMU_CTX_REG, %g1
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LEON_PI(sta %o0, [%g1] ASI_LEON_MMUREGS)
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SUN_PI_(sta %o0, [%g1] ASI_M_MMUREGS)
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retl
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nop
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ENDPROC(srmmu_set_context)
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/* int srmmu_get_context(void) */
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ENTRY(srmmu_get_context)
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mov SRMMU_CTX_REG, %o0
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LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0)
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SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0)
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retl
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nop
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ENDPROC(srmmu_get_context)
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/* unsigned int srmmu_get_fstatus(void) */
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ENTRY(srmmu_get_fstatus)
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mov SRMMU_FAULT_STATUS, %o0
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LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0)
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SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0)
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retl
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nop
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ENDPROC(srmmu_get_fstatus)
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/* unsigned int srmmu_get_faddr(void) */
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ENTRY(srmmu_get_faddr)
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mov SRMMU_FAULT_ADDR, %o0
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LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0)
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SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0)
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retl
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nop
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ENDPROC(srmmu_get_faddr)
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