/* SPDX-License-Identifier: GPL-2.0 */ /* Assembler variants of srmmu access functions. * Implemented in assembler to allow run-time patching. * LEON uses a different ASI for MMUREGS than SUN. * * The leon_1insn_patch infrastructure is used * for the run-time patching. */ #include <linux/linkage.h> #include <asm/asmmacro.h> #include <asm/pgtsrmmu.h> #include <asm/asi.h> /* unsigned int srmmu_get_mmureg(void) */ ENTRY(srmmu_get_mmureg) LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0) SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0) retl nop ENDPROC(srmmu_get_mmureg) /* void srmmu_set_mmureg(unsigned long regval) */ ENTRY(srmmu_set_mmureg) LEON_PI(sta %o0, [%g0] ASI_LEON_MMUREGS) SUN_PI_(sta %o0, [%g0] ASI_M_MMUREGS) retl nop ENDPROC(srmmu_set_mmureg) /* void srmmu_set_ctable_ptr(unsigned long paddr) */ ENTRY(srmmu_set_ctable_ptr) /* paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); */ srl %o0, 4, %g1 and %g1, SRMMU_CTX_PMASK, %g1 mov SRMMU_CTXTBL_PTR, %g2 LEON_PI(sta %g1, [%g2] ASI_LEON_MMUREGS) SUN_PI_(sta %g1, [%g2] ASI_M_MMUREGS) retl nop ENDPROC(srmmu_set_ctable_ptr) /* void srmmu_set_context(int context) */ ENTRY(srmmu_set_context) mov SRMMU_CTX_REG, %g1 LEON_PI(sta %o0, [%g1] ASI_LEON_MMUREGS) SUN_PI_(sta %o0, [%g1] ASI_M_MMUREGS) retl nop ENDPROC(srmmu_set_context) /* int srmmu_get_context(void) */ ENTRY(srmmu_get_context) mov SRMMU_CTX_REG, %o0 LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0) SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0) retl nop ENDPROC(srmmu_get_context) /* unsigned int srmmu_get_fstatus(void) */ ENTRY(srmmu_get_fstatus) mov SRMMU_FAULT_STATUS, %o0 LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0) SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0) retl nop ENDPROC(srmmu_get_fstatus) /* unsigned int srmmu_get_faddr(void) */ ENTRY(srmmu_get_faddr) mov SRMMU_FAULT_ADDR, %o0 LEON_PI(lda [%o0] ASI_LEON_MMUREGS, %o0) SUN_PI_(lda [%o0] ASI_M_MMUREGS, %o0) retl nop ENDPROC(srmmu_get_faddr) |