Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / arch / loongarch / include / asm / processor.h
blobc3bc44b5f5b30b2d43b901da6c339c26594e08fc
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5 #ifndef _ASM_PROCESSOR_H
6 #define _ASM_PROCESSOR_H
8 #include <linux/atomic.h>
9 #include <linux/cpumask.h>
10 #include <linux/sizes.h>
12 #include <asm/cpu.h>
13 #include <asm/cpu-info.h>
14 #include <asm/hw_breakpoint.h>
15 #include <asm/loongarch.h>
16 #include <asm/vdso/processor.h>
17 #include <uapi/asm/ptrace.h>
18 #include <uapi/asm/sigcontext.h>
20 #ifdef CONFIG_32BIT
22 #define TASK_SIZE 0x80000000UL
23 #define TASK_SIZE_MIN TASK_SIZE
24 #define STACK_TOP_MAX TASK_SIZE
26 #define TASK_IS_32BIT_ADDR 1
28 #endif
30 #ifdef CONFIG_64BIT
32 #define TASK_SIZE32 0x100000000UL
33 #define TASK_SIZE64 (0x1UL << ((cpu_vabits > VA_BITS) ? VA_BITS : cpu_vabits))
35 #define TASK_SIZE (test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
36 #define TASK_SIZE_MIN TASK_SIZE32
37 #define STACK_TOP_MAX TASK_SIZE64
39 #define TASK_SIZE_OF(tsk) \
40 (test_tsk_thread_flag(tsk, TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
42 #define TASK_IS_32BIT_ADDR test_thread_flag(TIF_32BIT_ADDR)
44 #endif
46 #define VDSO_RANDOMIZE_SIZE (TASK_IS_32BIT_ADDR ? SZ_1M : SZ_64M)
48 unsigned long stack_top(void);
49 #define STACK_TOP stack_top()
52 * This decides where the kernel will search for a free chunk of vm
53 * space during mmap's.
55 #define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)
57 #define FPU_REG_WIDTH 256
58 #define FPU_ALIGN __attribute__((aligned(32)))
60 union fpureg {
61 __u32 val32[FPU_REG_WIDTH / 32];
62 __u64 val64[FPU_REG_WIDTH / 64];
65 #define FPR_IDX(width, idx) (idx)
67 #define BUILD_FPR_ACCESS(width) \
68 static inline u##width get_fpr##width(union fpureg *fpr, unsigned idx) \
69 { \
70 return fpr->val##width[FPR_IDX(width, idx)]; \
71 } \
73 static inline void set_fpr##width(union fpureg *fpr, unsigned int idx, \
74 u##width val) \
75 { \
76 fpr->val##width[FPR_IDX(width, idx)] = val; \
79 BUILD_FPR_ACCESS(32)
80 BUILD_FPR_ACCESS(64)
82 struct loongarch_fpu {
83 uint64_t fcc; /* 8x8 */
84 uint32_t fcsr;
85 uint32_t ftop;
86 union fpureg fpr[NUM_FPU_REGS];
89 struct loongarch_lbt {
90 /* Scratch registers */
91 unsigned long scr0;
92 unsigned long scr1;
93 unsigned long scr2;
94 unsigned long scr3;
95 /* Eflags register */
96 unsigned long eflags;
99 #define INIT_CPUMASK { \
100 {0,} \
103 #define ARCH_MIN_TASKALIGN 32
105 struct loongarch_vdso_info;
108 * If you change thread_struct remember to change the #defines below too!
110 struct thread_struct {
111 /* Main processor registers. */
112 unsigned long reg01, reg03, reg22; /* ra sp fp */
113 unsigned long reg23, reg24, reg25, reg26; /* s0-s3 */
114 unsigned long reg27, reg28, reg29, reg30, reg31; /* s4-s8 */
116 /* __schedule() return address / call frame address */
117 unsigned long sched_ra;
118 unsigned long sched_cfa;
120 /* CSR registers */
121 unsigned long csr_prmd;
122 unsigned long csr_crmd;
123 unsigned long csr_euen;
124 unsigned long csr_ecfg;
125 unsigned long csr_badvaddr; /* Last user fault */
127 /* Other stuff associated with the thread. */
128 unsigned long trap_nr;
129 unsigned long error_code;
130 unsigned long single_step; /* Used by PTRACE_SINGLESTEP */
131 struct loongarch_vdso_info *vdso;
134 * FPU & vector registers, must be at the last of inherited
135 * context because they are conditionally copied at fork().
137 struct loongarch_fpu fpu FPU_ALIGN;
138 struct loongarch_lbt lbt; /* Also conditionally copied */
140 /* Hardware breakpoints pinned to this task. */
141 struct perf_event *hbp_break[LOONGARCH_MAX_BRP];
142 struct perf_event *hbp_watch[LOONGARCH_MAX_WRP];
145 #define thread_saved_ra(tsk) (tsk->thread.sched_ra)
146 #define thread_saved_fp(tsk) (tsk->thread.sched_cfa)
148 #define INIT_THREAD { \
149 /* \
150 * Main processor registers \
151 */ \
152 .reg01 = 0, \
153 .reg03 = 0, \
154 .reg22 = 0, \
155 .reg23 = 0, \
156 .reg24 = 0, \
157 .reg25 = 0, \
158 .reg26 = 0, \
159 .reg27 = 0, \
160 .reg28 = 0, \
161 .reg29 = 0, \
162 .reg30 = 0, \
163 .reg31 = 0, \
164 .sched_ra = 0, \
165 .sched_cfa = 0, \
166 .csr_crmd = 0, \
167 .csr_prmd = 0, \
168 .csr_euen = 0, \
169 .csr_ecfg = 0, \
170 .csr_badvaddr = 0, \
171 /* \
172 * Other stuff associated with the process \
173 */ \
174 .trap_nr = 0, \
175 .error_code = 0, \
176 /* \
177 * FPU & vector registers \
178 */ \
179 .fpu = { \
180 .fcc = 0, \
181 .fcsr = 0, \
182 .ftop = 0, \
183 .fpr = {{{0,},},}, \
184 }, \
185 .hbp_break = {0}, \
186 .hbp_watch = {0}, \
189 struct task_struct;
191 enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_HALT, IDLE_NOMWAIT, IDLE_POLL};
193 extern unsigned long boot_option_idle_override;
195 * Do necessary setup to start up a newly executed thread.
197 extern void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp);
199 unsigned long __get_wchan(struct task_struct *p);
201 #define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \
202 THREAD_SIZE - sizeof(struct pt_regs))
203 #define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk))
204 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->csr_era)
205 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[3])
206 #define KSTK_EUEN(tsk) (task_pt_regs(tsk)->csr_euen)
207 #define KSTK_ECFG(tsk) (task_pt_regs(tsk)->csr_ecfg)
209 #define return_address() ({__asm__ __volatile__("":::"$1"); __builtin_return_address(0);})
211 #ifdef CONFIG_CPU_HAS_PREFETCH
213 #define ARCH_HAS_PREFETCH
214 #define prefetch(x) __builtin_prefetch((x), 0, 1)
216 #define ARCH_HAS_PREFETCHW
217 #define prefetchw(x) __builtin_prefetch((x), 1, 1)
219 #endif
221 #endif /* _ASM_PROCESSOR_H */