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-rw-r--r--arch/arm64/include/asm/assembler.h133
1 files changed, 120 insertions, 13 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 70f7b9e04598..10b017c4bdd8 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -1,5 +1,5 @@
/*
- * Based on arch/arm/include/asm/assembler.h
+ * Based on arch/arm/include/asm/assembler.h, arch/arm/mm/proc-macros.S
*
* Copyright (C) 1996-2000 Russell King
* Copyright (C) 2012 ARM Ltd.
@@ -23,22 +23,13 @@
#ifndef __ASM_ASSEMBLER_H
#define __ASM_ASSEMBLER_H
+#include <asm/asm-offsets.h>
+#include <asm/page.h>
+#include <asm/pgtable-hwdef.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>
/*
- * Stack pushing/popping (register pairs only). Equivalent to store decrement
- * before, load increment after.
- */
- .macro push, xreg1, xreg2
- stp \xreg1, \xreg2, [sp, #-16]!
- .endm
-
- .macro pop, xreg1, xreg2
- ldp \xreg1, \xreg2, [sp], #16
- .endm
-
-/*
* Enable and disable interrupts.
*/
.macro disable_irq
@@ -212,6 +203,102 @@ lr .req x30 // link register
.endm
/*
+ * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
+ */
+ .macro vma_vm_mm, rd, rn
+ ldr \rd, [\rn, #VMA_VM_MM]
+ .endm
+
+/*
+ * mmid - get context id from mm pointer (mm->context.id)
+ */
+ .macro mmid, rd, rn
+ ldr \rd, [\rn, #MM_CONTEXT_ID]
+ .endm
+
+/*
+ * dcache_line_size - get the minimum D-cache line size from the CTR register.
+ */
+ .macro dcache_line_size, reg, tmp
+ mrs \tmp, ctr_el0 // read CTR
+ ubfm \tmp, \tmp, #16, #19 // cache line size encoding
+ mov \reg, #4 // bytes per word
+ lsl \reg, \reg, \tmp // actual cache line size
+ .endm
+
+/*
+ * icache_line_size - get the minimum I-cache line size from the CTR register.
+ */
+ .macro icache_line_size, reg, tmp
+ mrs \tmp, ctr_el0 // read CTR
+ and \tmp, \tmp, #0xf // cache line size encoding
+ mov \reg, #4 // bytes per word
+ lsl \reg, \reg, \tmp // actual cache line size
+ .endm
+
+/*
+ * tcr_set_idmap_t0sz - update TCR.T0SZ so that we can load the ID map
+ */
+ .macro tcr_set_idmap_t0sz, valreg, tmpreg
+#ifndef CONFIG_ARM64_VA_BITS_48
+ ldr_l \tmpreg, idmap_t0sz
+ bfi \valreg, \tmpreg, #TCR_T0SZ_OFFSET, #TCR_TxSZ_WIDTH
+#endif
+ .endm
+
+/*
+ * Macro to perform a data cache maintenance for the interval
+ * [kaddr, kaddr + size)
+ *
+ * op: operation passed to dc instruction
+ * domain: domain used in dsb instruciton
+ * kaddr: starting virtual address of the region
+ * size: size of the region
+ * Corrupts: kaddr, size, tmp1, tmp2
+ */
+ .macro dcache_by_line_op op, domain, kaddr, size, tmp1, tmp2
+ dcache_line_size \tmp1, \tmp2
+ add \size, \kaddr, \size
+ sub \tmp2, \tmp1, #1
+ bic \kaddr, \kaddr, \tmp2
+9998: dc \op, \kaddr
+ add \kaddr, \kaddr, \tmp1
+ cmp \kaddr, \size
+ b.lo 9998b
+ dsb \domain
+ .endm
+
+/*
+ * reset_pmuserenr_el0 - reset PMUSERENR_EL0 if PMUv3 present
+ */
+ .macro reset_pmuserenr_el0, tmpreg
+ mrs \tmpreg, id_aa64dfr0_el1 // Check ID_AA64DFR0_EL1 PMUVer
+ sbfx \tmpreg, \tmpreg, #8, #4
+ cmp \tmpreg, #1 // Skip if no PMU present
+ b.lt 9000f
+ msr pmuserenr_el0, xzr // Disable PMU access from EL0
+9000:
+ .endm
+
+/*
+ * copy_page - copy src to dest using temp registers t1-t8
+ */
+ .macro copy_page dest:req src:req t1:req t2:req t3:req t4:req t5:req t6:req t7:req t8:req
+9998: ldp \t1, \t2, [\src]
+ ldp \t3, \t4, [\src, #16]
+ ldp \t5, \t6, [\src, #32]
+ ldp \t7, \t8, [\src, #48]
+ add \src, \src, #64
+ stnp \t1, \t2, [\dest]
+ stnp \t3, \t4, [\dest, #16]
+ stnp \t5, \t6, [\dest, #32]
+ stnp \t7, \t8, [\dest, #48]
+ add \dest, \dest, #64
+ tst \src, #(PAGE_SIZE - 1)
+ b.ne 9998b
+ .endm
+
+/*
* Annotate a function as position independent, i.e., safe to be called before
* the kernel virtual mapping is activated.
*/
@@ -233,4 +320,24 @@ lr .req x30 // link register
.long \sym\()_hi32
.endm
+ /*
+ * mov_q - move an immediate constant into a 64-bit register using
+ * between 2 and 4 movz/movk instructions (depending on the
+ * magnitude and sign of the operand)
+ */
+ .macro mov_q, reg, val
+ .if (((\val) >> 31) == 0 || ((\val) >> 31) == 0x1ffffffff)
+ movz \reg, :abs_g1_s:\val
+ .else
+ .if (((\val) >> 47) == 0 || ((\val) >> 47) == 0x1ffff)
+ movz \reg, :abs_g2_s:\val
+ .else
+ movz \reg, :abs_g3:\val
+ movk \reg, :abs_g2_nc:\val
+ .endif
+ movk \reg, :abs_g1_nc:\val
+ .endif
+ movk \reg, :abs_g0_nc:\val
+ .endm
+
#endif /* __ASM_ASSEMBLER_H */