From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/sparc/mm/srmmu_access.S | 83 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 arch/sparc/mm/srmmu_access.S (limited to 'arch/sparc/mm/srmmu_access.S') diff --git a/arch/sparc/mm/srmmu_access.S b/arch/sparc/mm/srmmu_access.S new file mode 100644 index 0000000000..d8d2e644a5 --- /dev/null +++ b/arch/sparc/mm/srmmu_access.S @@ -0,0 +1,83 @@ +/* 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 + +#include +#include +#include + +/* 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) -- cgit v1.2.3