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83 lines
1.9 KiB
83 lines
1.9 KiB
/* 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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