Microblaze patches for 5.19-rc1

- Fix issues with freestanding
 - Wire memblock_dump_all()
 - Add support for memory reservation from DT
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Merge tag 'microblaze-v5.19' of git://git.monstr.eu/linux-2.6-microblaze

Pull microblaze updates from Michal Simek:

 - Fix issues with freestanding

 - Wire memblock_dump_all()

 - Add support for memory reservation from DT

* tag 'microblaze-v5.19' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: fix typos in comments
  microblaze: Add support for reserved memory defined by DT
  microblaze: Wire memblock_dump_all()
  microblaze: Use simple memmove/memcpy implementation from lib/string.c
  microblaze: Do loop unrolling for optimized memset implementation
  microblaze: Use simple memset implementation from lib/string.c

arch/microblaze/include/asm/string.h

@@ -8,6 +8,7 @@
 
 #ifdef __KERNEL__
 
+#ifdef CONFIG_OPT_LIB_FUNCTION
 #define __HAVE_ARCH_MEMSET
 #define __HAVE_ARCH_MEMCPY
 #define __HAVE_ARCH_MEMMOVE
@@ -15,6 +16,7 @@
 extern void *memset(void *, int, __kernel_size_t);
 extern void *memcpy(void *, const void *, __kernel_size_t);
 extern void *memmove(void *, const void *, __kernel_size_t);
+#endif
 
 #endif /* __KERNEL__ */
 

arch/microblaze/kernel/kgdb.c

@@ -31,7 +31,7 @@
 #define GDB_RTLBLO	55
 #define GDB_RTLBHI	56
 
-/* keep pvr separately because it is unchangeble */
+/* keep pvr separately because it is unchangeable */
 static struct pvr_s pvr;
 
 void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)

arch/microblaze/lib/memcpy.c

@@ -31,20 +31,7 @@
 
 #include <linux/string.h>
 
-#ifdef __HAVE_ARCH_MEMCPY
-#ifndef CONFIG_OPT_LIB_FUNCTION
-void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
-{
-	const char *src = v_src;
-	char *dst = v_dst;
-
-	/* Simple, byte oriented memcpy. */
-	while (c--)
-		*dst++ = *src++;
-
-	return v_dst;
-}
-#else /* CONFIG_OPT_LIB_FUNCTION */
+#ifdef CONFIG_OPT_LIB_FUNCTION
 void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
 {
 	const char *src = v_src;
@@ -188,6 +175,5 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
 
 	return v_dst;
 }
-#endif /* CONFIG_OPT_LIB_FUNCTION */
 EXPORT_SYMBOL(memcpy);
-#endif /* __HAVE_ARCH_MEMCPY */
+#endif /* CONFIG_OPT_LIB_FUNCTION */

arch/microblaze/lib/memmove.c

@@ -30,31 +30,7 @@
 #include <linux/compiler.h>
 #include <linux/string.h>
 
-#ifdef __HAVE_ARCH_MEMMOVE
-#ifndef CONFIG_OPT_LIB_FUNCTION
-void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
-{
-	const char *src = v_src;
-	char *dst = v_dst;
-
-	if (!c)
-		return v_dst;
-
-	/* Use memcpy when source is higher than dest */
-	if (v_dst <= v_src)
-		return memcpy(v_dst, v_src, c);
-
-	/* copy backwards, from end to beginning */
-	src += c;
-	dst += c;
-
-	/* Simple, byte oriented memmove. */
-	while (c--)
-		*--dst = *--src;
-
-	return v_dst;
-}
-#else /* CONFIG_OPT_LIB_FUNCTION */
+#ifdef CONFIG_OPT_LIB_FUNCTION
 void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 {
 	const char *src = v_src;
@@ -102,7 +78,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 
 		i_dst = (void *)dst;
 		/* Choose a copy scheme based on the source */
-		/* alignment relative to dstination. */
+		/* alignment relative to destination. */
 		switch ((unsigned long)src & 3) {
 		case 0x0:	/* Both byte offsets are aligned */
 
@@ -215,6 +191,5 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 	}
 	return v_dst;
 }
-#endif /* CONFIG_OPT_LIB_FUNCTION */
 EXPORT_SYMBOL(memmove);
-#endif /* __HAVE_ARCH_MEMMOVE */
+#endif /* CONFIG_OPT_LIB_FUNCTION */

arch/microblaze/lib/memset.c

@@ -30,22 +30,7 @@
 #include <linux/compiler.h>
 #include <linux/string.h>
 
-#ifdef __HAVE_ARCH_MEMSET
-#ifndef CONFIG_OPT_LIB_FUNCTION
-void *memset(void *v_src, int c, __kernel_size_t n)
-{
-	char *src = v_src;
-
-	/* Truncate c to 8 bits */
-	c = (c & 0xFF);
-
-	/* Simple, byte oriented memset or the rest of count. */
-	while (n--)
-		*src++ = c;
-
-	return v_src;
-}
-#else /* CONFIG_OPT_LIB_FUNCTION */
+#ifdef CONFIG_OPT_LIB_FUNCTION
 void *memset(void *v_src, int c, __kernel_size_t n)
 {
 	char *src = v_src;
@@ -89,11 +74,21 @@ void *memset(void *v_src, int c, __kernel_size_t n)
 	}
 
 	/* Simple, byte oriented memset or the rest of count. */
-	while (n--)
+	switch (n) {
+	case 3:
 		*src++ = c;
+		fallthrough;
+	case 2:
+		*src++ = c;
+		fallthrough;
+	case 1:
+		*src++ = c;
+		break;
+	default:
+		break;
+	}
 
 	return v_src;
 }
-#endif /* CONFIG_OPT_LIB_FUNCTION */
 EXPORT_SYMBOL(memset);
-#endif /* __HAVE_ARCH_MEMSET */
+#endif /* CONFIG_OPT_LIB_FUNCTION */

arch/microblaze/mm/init.c

@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h> /* mem_init */
 #include <linux/initrd.h>
+#include <linux/of_fdt.h>
 #include <linux/pagemap.h>
 #include <linux/pfn.h>
 #include <linux/slab.h>
@@ -261,8 +262,12 @@ asmlinkage void __init mmu_init(void)
 
 	parse_early_param();
 
+	early_init_fdt_scan_reserved_mem();
+
 	/* CMA initialization */
 	dma_contiguous_reserve(memory_start + lowmem_size - 1);
+
+	memblock_dump_all();
 }
 
 void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask)