[ARM] 3059/1: fix XIP support
Patch from Nicolas Pitre
Fix XIP support after recent bootmem code refactoring.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index f449681..fd079ff 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -363,20 +363,16 @@
memcpy(&meminfo, mi, sizeof(meminfo));
-#ifdef CONFIG_XIP_KERNEL
-#error needs fixing
- p->pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & PMD_MASK);
- p->virtual = (unsigned long)&_stext & PMD_MASK;
- p->length = ((unsigned long)&_etext - p->virtual + ~PMD_MASK) & PMD_MASK;
- p->type = MT_ROM;
- p ++;
-#endif
-
/*
* Clear out all the mappings below the kernel image.
- * FIXME: what about XIP?
*/
- for (addr = 0; addr < PAGE_OFFSET; addr += PGDIR_SIZE)
+ for (addr = 0; addr < MODULE_START; addr += PGDIR_SIZE)
+ pmd_clear(pmd_off_k(addr));
+#ifdef CONFIG_XIP_KERNEL
+ /* The XIP kernel is mapped in the module area -- skip over it */
+ addr = ((unsigned long)&_etext + PGDIR_SIZE - 1) & PGDIR_MASK;
+#endif
+ for ( ; addr < PAGE_OFFSET; addr += PGDIR_SIZE)
pmd_clear(pmd_off_k(addr));
/*
@@ -436,6 +432,18 @@
pmd_clear(pmd_off_k(addr));
/*
+ * Map the kernel if it is XIP.
+ * It is always first in the modulearea.
+ */
+#ifdef CONFIG_XIP_KERNEL
+ map.pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & PGDIR_MASK);
+ map.virtual = MODULE_START;
+ map.length = ((unsigned long)&_etext - map.virtual + ~PGDIR_MASK) & PGDIR_MASK;
+ map.type = MT_ROM;
+ create_mapping(&map);
+#endif
+
+ /*
* Map the cache flushing regions.
*/
#ifdef FLUSH_BASE