Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sparc / mm / srmmu_access.S

diff --git a/kernel/arch/sparc/mm/srmmu_access.S b/kernel/arch/sparc/mm/srmmu_access.S
new file mode 100644 (file)
index 0000000..d0a67b2
--- /dev/null
+++ b/kernel/arch/sparc/mm/srmmu_access.S
@@ -0,0 +1,82 @@
+/* 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)