84 lines
1.9 KiB
ArmAsm
84 lines
1.9 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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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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