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authorCatalin Marinas <catalin.marinas@arm.com>2012-03-05 06:49:26 -0500
committerCatalin Marinas <catalin.marinas@arm.com>2012-09-17 05:24:44 -0400
commit0be7320a635c2e434e8b67e0e9474a85ceb421c4 (patch)
tree1c2097fe020e4308b159b7819d183e81c44fdb2a /arch/arm64
parent048fa2df92c325cb4425dccd66c8922c8342b507 (diff)
arm64: Assembly macros and definitions
This patch introduces several assembly macros and definitions used in the .S files across arch/arm64/ like IRQ disabling/enabling, together with asm-offsets.c. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/asm-offsets.h1
-rw-r--r--arch/arm64/include/asm/assembler.h109
-rw-r--r--arch/arm64/kernel/asm-offsets.c108
-rw-r--r--arch/arm64/mm/proc-macros.S55
4 files changed, 273 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/asm-offsets.h b/arch/arm64/include/asm/asm-offsets.h
new file mode 100644
index 00000000000..d370ee36a18
--- /dev/null
+++ b/arch/arm64/include/asm/asm-offsets.h
@@ -0,0 +1 @@
#include <generated/asm-offsets.h>
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
new file mode 100644
index 00000000000..da2a13e8f1e
--- /dev/null
+++ b/arch/arm64/include/asm/assembler.h
@@ -0,0 +1,109 @@
1/*
2 * Based on arch/arm/include/asm/assembler.h
3 *
4 * Copyright (C) 1996-2000 Russell King
5 * Copyright (C) 2012 ARM Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19#ifndef __ASSEMBLY__
20#error "Only include this from assembly code"
21#endif
22
23#include <asm/ptrace.h>
24
25/*
26 * Stack pushing/popping (register pairs only). Equivalent to store decrement
27 * before, load increment after.
28 */
29 .macro push, xreg1, xreg2
30 stp \xreg1, \xreg2, [sp, #-16]!
31 .endm
32
33 .macro pop, xreg1, xreg2
34 ldp \xreg1, \xreg2, [sp], #16
35 .endm
36
37/*
38 * Enable and disable interrupts.
39 */
40 .macro disable_irq
41 msr daifset, #2
42 .endm
43
44 .macro enable_irq
45 msr daifclr, #2
46 .endm
47
48/*
49 * Save/disable and restore interrupts.
50 */
51 .macro save_and_disable_irqs, olddaif
52 mrs \olddaif, daif
53 disable_irq
54 .endm
55
56 .macro restore_irqs, olddaif
57 msr daif, \olddaif
58 .endm
59
60/*
61 * Enable and disable debug exceptions.
62 */
63 .macro disable_dbg
64 msr daifset, #8
65 .endm
66
67 .macro enable_dbg
68 msr daifclr, #8
69 .endm
70
71 .macro disable_step, tmp
72 mrs \tmp, mdscr_el1
73 bic \tmp, \tmp, #1
74 msr mdscr_el1, \tmp
75 .endm
76
77 .macro enable_step, tmp
78 mrs \tmp, mdscr_el1
79 orr \tmp, \tmp, #1
80 msr mdscr_el1, \tmp
81 .endm
82
83 .macro enable_dbg_if_not_stepping, tmp
84 mrs \tmp, mdscr_el1
85 tbnz \tmp, #1, 9990f
86 enable_dbg
879990:
88 .endm
89
90/*
91 * SMP data memory barrier
92 */
93 .macro smp_dmb, opt
94#ifdef CONFIG_SMP
95 dmb \opt
96#endif
97 .endm
98
99#define USER(l, x...) \
1009999: x; \
101 .section __ex_table,"a"; \
102 .align 3; \
103 .quad 9999b,l; \
104 .previous
105
106/*
107 * Register aliases.
108 */
109lr .req x30 // link register
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
new file mode 100644
index 00000000000..a2a4d810bea
--- /dev/null
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -0,0 +1,108 @@
1/*
2 * Based on arch/arm/kernel/asm-offsets.c
3 *
4 * Copyright (C) 1995-2003 Russell King
5 * 2001-2002 Keith Owens
6 * Copyright (C) 2012 ARM Ltd.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <linux/sched.h>
22#include <linux/mm.h>
23#include <linux/dma-mapping.h>
24#include <asm/thread_info.h>
25#include <asm/memory.h>
26#include <asm/cputable.h>
27#include <asm/vdso_datapage.h>
28#include <linux/kbuild.h>
29
30int main(void)
31{
32 DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
33 BLANK();
34 DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
35 DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
36 DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
37 DEFINE(TI_TASK, offsetof(struct thread_info, task));
38 DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain));
39 DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
40 BLANK();
41 DEFINE(THREAD_CPU_CONTEXT, offsetof(struct task_struct, thread.cpu_context));
42 BLANK();
43 DEFINE(S_X0, offsetof(struct pt_regs, regs[0]));
44 DEFINE(S_X1, offsetof(struct pt_regs, regs[1]));
45 DEFINE(S_X2, offsetof(struct pt_regs, regs[2]));
46 DEFINE(S_X3, offsetof(struct pt_regs, regs[3]));
47 DEFINE(S_X4, offsetof(struct pt_regs, regs[4]));
48 DEFINE(S_X5, offsetof(struct pt_regs, regs[5]));
49 DEFINE(S_X6, offsetof(struct pt_regs, regs[6]));
50 DEFINE(S_X7, offsetof(struct pt_regs, regs[7]));
51 DEFINE(S_LR, offsetof(struct pt_regs, regs[30]));
52 DEFINE(S_SP, offsetof(struct pt_regs, sp));
53#ifdef CONFIG_COMPAT
54 DEFINE(S_COMPAT_SP, offsetof(struct pt_regs, compat_sp));
55#endif
56 DEFINE(S_PSTATE, offsetof(struct pt_regs, pstate));
57 DEFINE(S_PC, offsetof(struct pt_regs, pc));
58 DEFINE(S_ORIG_X0, offsetof(struct pt_regs, orig_x0));
59 DEFINE(S_SYSCALLNO, offsetof(struct pt_regs, syscallno));
60 DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
61 BLANK();
62 DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id));
63 BLANK();
64 DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
65 DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
66 BLANK();
67 DEFINE(VM_EXEC, VM_EXEC);
68 BLANK();
69 DEFINE(PAGE_SZ, PAGE_SIZE);
70 BLANK();
71 DEFINE(CPU_INFO_SZ, sizeof(struct cpu_info));
72 DEFINE(CPU_INFO_SETUP, offsetof(struct cpu_info, cpu_setup));
73 BLANK();
74 DEFINE(DMA_BIDIRECTIONAL, DMA_BIDIRECTIONAL);
75 DEFINE(DMA_TO_DEVICE, DMA_TO_DEVICE);
76 DEFINE(DMA_FROM_DEVICE, DMA_FROM_DEVICE);
77 BLANK();
78 DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
79 DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
80 DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
81 DEFINE(CLOCK_REALTIME_COARSE, CLOCK_REALTIME_COARSE);
82 DEFINE(CLOCK_MONOTONIC_COARSE,CLOCK_MONOTONIC_COARSE);
83 DEFINE(CLOCK_COARSE_RES, LOW_RES_NSEC);
84 DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
85 BLANK();
86 DEFINE(VDSO_CS_CYCLE_LAST, offsetof(struct vdso_data, cs_cycle_last));
87 DEFINE(VDSO_XTIME_CLK_SEC, offsetof(struct vdso_data, xtime_clock_sec));
88 DEFINE(VDSO_XTIME_CLK_NSEC, offsetof(struct vdso_data, xtime_clock_nsec));
89 DEFINE(VDSO_XTIME_CRS_SEC, offsetof(struct vdso_data, xtime_coarse_sec));
90 DEFINE(VDSO_XTIME_CRS_NSEC, offsetof(struct vdso_data, xtime_coarse_nsec));
91 DEFINE(VDSO_WTM_CLK_SEC, offsetof(struct vdso_data, wtm_clock_sec));
92 DEFINE(VDSO_WTM_CLK_NSEC, offsetof(struct vdso_data, wtm_clock_nsec));
93 DEFINE(VDSO_TB_SEQ_COUNT, offsetof(struct vdso_data, tb_seq_count));
94 DEFINE(VDSO_CS_MULT, offsetof(struct vdso_data, cs_mult));
95 DEFINE(VDSO_CS_SHIFT, offsetof(struct vdso_data, cs_shift));
96 DEFINE(VDSO_TZ_MINWEST, offsetof(struct vdso_data, tz_minuteswest));
97 DEFINE(VDSO_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime));
98 DEFINE(VDSO_USE_SYSCALL, offsetof(struct vdso_data, use_syscall));
99 BLANK();
100 DEFINE(TVAL_TV_SEC, offsetof(struct timeval, tv_sec));
101 DEFINE(TVAL_TV_USEC, offsetof(struct timeval, tv_usec));
102 DEFINE(TSPEC_TV_SEC, offsetof(struct timespec, tv_sec));
103 DEFINE(TSPEC_TV_NSEC, offsetof(struct timespec, tv_nsec));
104 BLANK();
105 DEFINE(TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
106 DEFINE(TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
107 return 0;
108}
diff --git a/arch/arm64/mm/proc-macros.S b/arch/arm64/mm/proc-macros.S
new file mode 100644
index 00000000000..8957b822010
--- /dev/null
+++ b/arch/arm64/mm/proc-macros.S
@@ -0,0 +1,55 @@
1/*
2 * Based on arch/arm/mm/proc-macros.S
3 *
4 * Copyright (C) 2012 ARM Ltd.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19#include <asm/asm-offsets.h>
20#include <asm/thread_info.h>
21
22/*
23 * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
24 */
25 .macro vma_vm_mm, rd, rn
26 ldr \rd, [\rn, #VMA_VM_MM]
27 .endm
28
29/*
30 * mmid - get context id from mm pointer (mm->context.id)
31 */
32 .macro mmid, rd, rn
33 ldr \rd, [\rn, #MM_CONTEXT_ID]
34 .endm
35
36/*
37 * dcache_line_size - get the minimum D-cache line size from the CTR register.
38 */
39 .macro dcache_line_size, reg, tmp
40 mrs \tmp, ctr_el0 // read CTR
41 lsr \tmp, \tmp, #16
42 and \tmp, \tmp, #0xf // cache line size encoding
43 mov \reg, #4 // bytes per word
44 lsl \reg, \reg, \tmp // actual cache line size
45 .endm
46
47/*
48 * icache_line_size - get the minimum I-cache line size from the CTR register.
49 */
50 .macro icache_line_size, reg, tmp
51 mrs \tmp, ctr_el0 // read CTR
52 and \tmp, \tmp, #0xf // cache line size encoding
53 mov \reg, #4 // bytes per word
54 lsl \reg, \reg, \tmp // actual cache line size
55 .endm
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-23 03:31:38 -0400