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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/loongarch/include/asm/processor.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/loongarch/include/asm/processor.h')
-rw-r--r--arch/loongarch/include/asm/processor.h221
1 files changed, 221 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h
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+++ b/arch/loongarch/include/asm/processor.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef _ASM_PROCESSOR_H
+#define _ASM_PROCESSOR_H
+
+#include <linux/atomic.h>
+#include <linux/cpumask.h>
+#include <linux/sizes.h>
+
+#include <asm/cpu.h>
+#include <asm/cpu-info.h>
+#include <asm/hw_breakpoint.h>
+#include <asm/loongarch.h>
+#include <asm/vdso/processor.h>
+#include <uapi/asm/ptrace.h>
+#include <uapi/asm/sigcontext.h>
+
+#ifdef CONFIG_32BIT
+
+#define TASK_SIZE 0x80000000UL
+#define TASK_SIZE_MIN TASK_SIZE
+#define STACK_TOP_MAX TASK_SIZE
+
+#define TASK_IS_32BIT_ADDR 1
+
+#endif
+
+#ifdef CONFIG_64BIT
+
+#define TASK_SIZE32 0x100000000UL
+#define TASK_SIZE64 (0x1UL << ((cpu_vabits > VA_BITS) ? VA_BITS : cpu_vabits))
+
+#define TASK_SIZE (test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
+#define TASK_SIZE_MIN TASK_SIZE32
+#define STACK_TOP_MAX TASK_SIZE64
+
+#define TASK_SIZE_OF(tsk) \
+ (test_tsk_thread_flag(tsk, TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
+
+#define TASK_IS_32BIT_ADDR test_thread_flag(TIF_32BIT_ADDR)
+
+#endif
+
+#define VDSO_RANDOMIZE_SIZE (TASK_IS_32BIT_ADDR ? SZ_1M : SZ_64M)
+
+unsigned long stack_top(void);
+#define STACK_TOP stack_top()
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)
+
+#define FPU_REG_WIDTH 256
+#define FPU_ALIGN __attribute__((aligned(32)))
+
+union fpureg {
+ __u32 val32[FPU_REG_WIDTH / 32];
+ __u64 val64[FPU_REG_WIDTH / 64];
+};
+
+#define FPR_IDX(width, idx) (idx)
+
+#define BUILD_FPR_ACCESS(width) \
+static inline u##width get_fpr##width(union fpureg *fpr, unsigned idx) \
+{ \
+ return fpr->val##width[FPR_IDX(width, idx)]; \
+} \
+ \
+static inline void set_fpr##width(union fpureg *fpr, unsigned int idx, \
+ u##width val) \
+{ \
+ fpr->val##width[FPR_IDX(width, idx)] = val; \
+}
+
+BUILD_FPR_ACCESS(32)
+BUILD_FPR_ACCESS(64)
+
+struct loongarch_fpu {
+ uint64_t fcc; /* 8x8 */
+ uint32_t fcsr;
+ uint32_t ftop;
+ union fpureg fpr[NUM_FPU_REGS];
+};
+
+struct loongarch_lbt {
+ /* Scratch registers */
+ unsigned long scr0;
+ unsigned long scr1;
+ unsigned long scr2;
+ unsigned long scr3;
+ /* Eflags register */
+ unsigned long eflags;
+};
+
+#define INIT_CPUMASK { \
+ {0,} \
+}
+
+#define ARCH_MIN_TASKALIGN 32
+
+struct loongarch_vdso_info;
+
+/*
+ * If you change thread_struct remember to change the #defines below too!
+ */
+struct thread_struct {
+ /* Main processor registers. */
+ unsigned long reg01, reg03, reg22; /* ra sp fp */
+ unsigned long reg23, reg24, reg25, reg26; /* s0-s3 */
+ unsigned long reg27, reg28, reg29, reg30, reg31; /* s4-s8 */
+
+ /* __schedule() return address / call frame address */
+ unsigned long sched_ra;
+ unsigned long sched_cfa;
+
+ /* CSR registers */
+ unsigned long csr_prmd;
+ unsigned long csr_crmd;
+ unsigned long csr_euen;
+ unsigned long csr_ecfg;
+ unsigned long csr_badvaddr; /* Last user fault */
+
+ /* Other stuff associated with the thread. */
+ unsigned long trap_nr;
+ unsigned long error_code;
+ unsigned long single_step; /* Used by PTRACE_SINGLESTEP */
+ struct loongarch_vdso_info *vdso;
+
+ /*
+ * FPU & vector registers, must be at the last of inherited
+ * context because they are conditionally copied at fork().
+ */
+ struct loongarch_fpu fpu FPU_ALIGN;
+ struct loongarch_lbt lbt; /* Also conditionally copied */
+
+ /* Hardware breakpoints pinned to this task. */
+ struct perf_event *hbp_break[LOONGARCH_MAX_BRP];
+ struct perf_event *hbp_watch[LOONGARCH_MAX_WRP];
+};
+
+#define thread_saved_ra(tsk) (tsk->thread.sched_ra)
+#define thread_saved_fp(tsk) (tsk->thread.sched_cfa)
+
+#define INIT_THREAD { \
+ /* \
+ * Main processor registers \
+ */ \
+ .reg01 = 0, \
+ .reg03 = 0, \
+ .reg22 = 0, \
+ .reg23 = 0, \
+ .reg24 = 0, \
+ .reg25 = 0, \
+ .reg26 = 0, \
+ .reg27 = 0, \
+ .reg28 = 0, \
+ .reg29 = 0, \
+ .reg30 = 0, \
+ .reg31 = 0, \
+ .sched_ra = 0, \
+ .sched_cfa = 0, \
+ .csr_crmd = 0, \
+ .csr_prmd = 0, \
+ .csr_euen = 0, \
+ .csr_ecfg = 0, \
+ .csr_badvaddr = 0, \
+ /* \
+ * Other stuff associated with the process \
+ */ \
+ .trap_nr = 0, \
+ .error_code = 0, \
+ /* \
+ * FPU & vector registers \
+ */ \
+ .fpu = { \
+ .fcc = 0, \
+ .fcsr = 0, \
+ .ftop = 0, \
+ .fpr = {{{0,},},}, \
+ }, \
+ .hbp_break = {0}, \
+ .hbp_watch = {0}, \
+}
+
+struct task_struct;
+
+enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_HALT, IDLE_NOMWAIT, IDLE_POLL};
+
+extern unsigned long boot_option_idle_override;
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+extern void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp);
+
+unsigned long __get_wchan(struct task_struct *p);
+
+#define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \
+ THREAD_SIZE - sizeof(struct pt_regs))
+#define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk))
+#define KSTK_EIP(tsk) (task_pt_regs(tsk)->csr_era)
+#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[3])
+#define KSTK_EUEN(tsk) (task_pt_regs(tsk)->csr_euen)
+#define KSTK_ECFG(tsk) (task_pt_regs(tsk)->csr_ecfg)
+
+#define return_address() ({__asm__ __volatile__("":::"$1"); __builtin_return_address(0);})
+
+#ifdef CONFIG_CPU_HAS_PREFETCH
+
+#define ARCH_HAS_PREFETCH
+#define prefetch(x) __builtin_prefetch((x), 0, 1)
+
+#define ARCH_HAS_PREFETCHW
+#define prefetchw(x) __builtin_prefetch((x), 1, 1)
+
+#endif
+
+#endif /* _ASM_PROCESSOR_H */