Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 136 insertions, 0 deletions

diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h
new file mode 100644
index 000000000..0c83644bf
--- /dev/null
+++ b/arch/parisc/include/asm/cacheflush.h
@@ -0,0 +1,136 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PARISC_CACHEFLUSH_H
+#define _PARISC_CACHEFLUSH_H
+
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <asm/tlbflush.h>
+
+/* The usual comment is "Caches aren't brain-dead on the <architecture>".
+ * Unfortunately, that doesn't apply to PA-RISC. */
+
+/* Internal implementation */
+void flush_data_cache_local(void *);  /* flushes local data-cache only */
+void flush_instruction_cache_local(void *); /* flushes local code-cache only */
+#ifdef CONFIG_SMP
+void flush_data_cache(void); /* flushes data-cache only (all processors) */
+void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
+#else
+#define flush_data_cache() flush_data_cache_local(NULL)
+#define flush_instruction_cache() flush_instruction_cache_local(NULL)
+#endif
+
+#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
+
+void flush_user_icache_range_asm(unsigned long, unsigned long);
+void flush_kernel_icache_range_asm(unsigned long, unsigned long);
+void flush_user_dcache_range_asm(unsigned long, unsigned long);
+void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
+void purge_kernel_dcache_range_asm(unsigned long, unsigned long);
+void flush_kernel_dcache_page_asm(void *);
+void flush_kernel_icache_page(void *);
+
+/* Cache flush operations */
+
+void flush_cache_all_local(void);
+void flush_cache_all(void);
+void flush_cache_mm(struct mm_struct *mm);
+
+#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
+void flush_kernel_dcache_page_addr(void *addr);
+static inline void flush_kernel_dcache_page(struct page *page)
+{
+	flush_kernel_dcache_page_addr(page_address(page));
+}
+
+#define flush_kernel_dcache_range(start,size) \
+	flush_kernel_dcache_range_asm((start), (start)+(size));
+
+void flush_kernel_vmap_range(void *vaddr, int size);
+void invalidate_kernel_vmap_range(void *vaddr, int size);
+
+#define flush_cache_vmap(start, end)		flush_cache_all()
+#define flush_cache_vunmap(start, end)		flush_cache_all()
+
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
+extern void flush_dcache_page(struct page *page);
+
+#define flush_dcache_mmap_lock(mapping)		xa_lock_irq(&mapping->i_pages)
+#define flush_dcache_mmap_unlock(mapping)	xa_unlock_irq(&mapping->i_pages)
+
+#define flush_icache_page(vma,page)	do { 		\
+	flush_kernel_dcache_page(page);			\
+	flush_kernel_icache_page(page_address(page)); 	\
+} while (0)
+
+#define flush_icache_range(s,e)		do { 		\
+	flush_kernel_dcache_range_asm(s,e); 		\
+	flush_kernel_icache_range_asm(s,e); 		\
+} while (0)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
+	memcpy(dst, src, len); \
+	flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
+} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
+	memcpy(dst, src, len); \
+} while (0)
+
+void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
+void flush_cache_range(struct vm_area_struct *vma,
+		unsigned long start, unsigned long end);
+
+/* defined in pacache.S exported in cache.c used by flush_anon_page */
+void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
+
+#define ARCH_HAS_FLUSH_ANON_PAGE
+static inline void
+flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
+{
+	if (PageAnon(page)) {
+		flush_tlb_page(vma, vmaddr);
+		preempt_disable();
+		flush_dcache_page_asm(page_to_phys(page), vmaddr);
+		preempt_enable();
+	}
+}
+
+#include <asm/kmap_types.h>
+
+#define ARCH_HAS_KMAP
+
+static inline void *kmap(struct page *page)
+{
+	might_sleep();
+	return page_address(page);
+}
+
+static inline void kunmap(struct page *page)
+{
+	flush_kernel_dcache_page_addr(page_address(page));
+}
+
+static inline void *kmap_atomic(struct page *page)
+{
+	preempt_disable();
+	pagefault_disable();
+	return page_address(page);
+}
+
+static inline void __kunmap_atomic(void *addr)
+{
+	flush_kernel_dcache_page_addr(addr);
+	pagefault_enable();
+	preempt_enable();
+}
+
+#define kmap_atomic_prot(page, prot)	kmap_atomic(page)
+#define kmap_atomic_pfn(pfn)	kmap_atomic(pfn_to_page(pfn))
+
+#endif /* _PARISC_CACHEFLUSH_H */
+