| /* 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) |
