Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 191 insertions, 0 deletions

diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h
new file mode 100644
index 000000000..c82f7a29e
--- /dev/null
+++ b/arch/arm/include/asm/proc-fns.h
@@ -0,0 +1,191 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  arch/arm/include/asm/proc-fns.h
+ *
+ *  Copyright (C) 1997-1999 Russell King
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ */
+#ifndef __ASM_PROCFNS_H
+#define __ASM_PROCFNS_H
+
+#ifdef __KERNEL__
+
+#include <asm/glue-proc.h>
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+
+struct mm_struct;
+
+/*
+ * Don't change this structure - ASM code relies on it.
+ */
+struct processor {
+	/* MISC
+	 * get data abort address/flags
+	 */
+	void (*_data_abort)(unsigned long pc);
+	/*
+	 * Retrieve prefetch fault address
+	 */
+	unsigned long (*_prefetch_abort)(unsigned long lr);
+	/*
+	 * Set up any processor specifics
+	 */
+	void (*_proc_init)(void);
+	/*
+	 * Check for processor bugs
+	 */
+	void (*check_bugs)(void);
+	/*
+	 * Disable any processor specifics
+	 */
+	void (*_proc_fin)(void);
+	/*
+	 * Special stuff for a reset
+	 */
+	void (*reset)(unsigned long addr, bool hvc) __attribute__((noreturn));
+	/*
+	 * Idle the processor
+	 */
+	int (*_do_idle)(void);
+	/*
+	 * Processor architecture specific
+	 */
+	/*
+	 * clean a virtual address range from the
+	 * D-cache without flushing the cache.
+	 */
+	void (*dcache_clean_area)(void *addr, int size);
+
+	/*
+	 * Set the page table
+	 */
+	void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm);
+	/*
+	 * Set a possibly extended PTE.  Non-extended PTEs should
+	 * ignore 'ext'.
+	 */
+#ifdef CONFIG_ARM_LPAE
+	void (*set_pte_ext)(pte_t *ptep, pte_t pte);
+#else
+	void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
+#endif
+
+	/* Suspend/resume */
+	unsigned int suspend_size;
+	void (*do_suspend)(void *);
+	void (*do_resume)(void *);
+};
+
+#ifndef MULTI_CPU
+static inline void init_proc_vtable(const struct processor *p)
+{
+}
+
+extern void cpu_proc_init(void);
+extern void cpu_proc_fin(void);
+extern int cpu_do_idle(void);
+extern void cpu_dcache_clean_area(void *, int);
+extern void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+#ifdef CONFIG_ARM_LPAE
+extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
+#else
+extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+#endif
+extern void cpu_reset(unsigned long addr, bool hvc) __attribute__((noreturn));
+
+/* These three are private to arch/arm/kernel/suspend.c */
+extern void cpu_do_suspend(void *);
+extern void cpu_do_resume(void *);
+#else
+
+extern struct processor processor;
+#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
+#include <linux/smp.h>
+/*
+ * This can't be a per-cpu variable because we need to access it before
+ * per-cpu has been initialised.  We have a couple of functions that are
+ * called in a pre-emptible context, and so can't use smp_processor_id()
+ * there, hence PROC_TABLE().  We insist in init_proc_vtable() that the
+ * function pointers for these are identical across all CPUs.
+ */
+extern struct processor *cpu_vtable[];
+#define PROC_VTABLE(f)			cpu_vtable[smp_processor_id()]->f
+#define PROC_TABLE(f)			cpu_vtable[0]->f
+static inline void init_proc_vtable(const struct processor *p)
+{
+	unsigned int cpu = smp_processor_id();
+	*cpu_vtable[cpu] = *p;
+	WARN_ON_ONCE(cpu_vtable[cpu]->dcache_clean_area !=
+		     cpu_vtable[0]->dcache_clean_area);
+	WARN_ON_ONCE(cpu_vtable[cpu]->set_pte_ext !=
+		     cpu_vtable[0]->set_pte_ext);
+}
+#else
+#define PROC_VTABLE(f)			processor.f
+#define PROC_TABLE(f)			processor.f
+static inline void init_proc_vtable(const struct processor *p)
+{
+	processor = *p;
+}
+#endif
+
+#define cpu_proc_init			PROC_VTABLE(_proc_init)
+#define cpu_check_bugs			PROC_VTABLE(check_bugs)
+#define cpu_proc_fin			PROC_VTABLE(_proc_fin)
+#define cpu_reset			PROC_VTABLE(reset)
+#define cpu_do_idle			PROC_VTABLE(_do_idle)
+#define cpu_dcache_clean_area		PROC_TABLE(dcache_clean_area)
+#define cpu_set_pte_ext			PROC_TABLE(set_pte_ext)
+#define cpu_do_switch_mm		PROC_VTABLE(switch_mm)
+
+/* These two are private to arch/arm/kernel/suspend.c */
+#define cpu_do_suspend			PROC_VTABLE(do_suspend)
+#define cpu_do_resume			PROC_VTABLE(do_resume)
+#endif
+
+extern void cpu_resume(void);
+
+#include <asm/memory.h>
+
+#ifdef CONFIG_MMU
+
+#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
+
+#ifdef CONFIG_ARM_LPAE
+
+#define cpu_get_ttbr(nr)					\
+	({							\
+		u64 ttbr;					\
+		__asm__("mrrc	p15, " #nr ", %Q0, %R0, c2"	\
+			: "=r" (ttbr));				\
+		ttbr;						\
+	})
+
+#define cpu_get_pgd()	\
+	({						\
+		u64 pg = cpu_get_ttbr(0);		\
+		pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1);	\
+		(pgd_t *)phys_to_virt(pg);		\
+	})
+#else
+#define cpu_get_pgd()	\
+	({						\
+		unsigned long pg;			\
+		__asm__("mrc	p15, 0, %0, c2, c0, 0"	\
+			 : "=r" (pg) : : "cc");		\
+		pg &= ~0x3fff;				\
+		(pgd_t *)phys_to_virt(pg);		\
+	})
+#endif
+
+#else	/*!CONFIG_MMU */
+
+#define cpu_switch_mm(pgd,mm)	{ }
+
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __KERNEL__ */
+#endif /* __ASM_PROCFNS_H */