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authorJeremy Kerr <jeremy.kerr@canonical.com>2010-01-30 01:31:21 -0700
committerGrant Likely <grant.likely@secretlab.ca>2010-02-09 08:34:10 -0700
commit1406bc2f57787797d1f6a3675c019a7093769275 (patch)
tree2b3bee50a75fa1502ef00eccf7bcecda19acd56a /include/linux/of_fdt.h
parent50ab2fe147e22c8786552cda1791a61ae81b84d2 (diff)
downloadop-kernel-dev-1406bc2f57787797d1f6a3675c019a7093769275.zip
op-kernel-dev-1406bc2f57787797d1f6a3675c019a7093769275.tar.gz
of/flattree: use callback to setup initrd from /chosen
At present, the fdt code sets the kernel-wide initrd_start and initrd_end variables when parsing /chosen. On ARM, we only set these once the bootmem has been reserved. This change adds an arch hook to setup the initrd from the device tree: void early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end); The arch-specific code can then setup the initrd however it likes. Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'include/linux/of_fdt.h')
-rw-r--r--include/linux/of_fdt.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index bf26bd5..f32f0fc 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -80,6 +80,16 @@ extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
extern void early_init_dt_add_memory_arch(u64 base, u64 size);
extern u64 dt_mem_next_cell(int s, u32 **cellp);
+/*
+ * If BLK_DEV_INITRD, the fdt early init code will call this function,
+ * to be provided by the arch code. start and end are specified as
+ * physical addresses.
+ */
+#ifdef CONFIG_BLK_DEV_INITRD
+extern void early_init_dt_setup_initrd_arch(unsigned long start,
+ unsigned long end);
+#endif
+
/* Early flat tree scan hooks */
extern int early_init_dt_scan_root(unsigned long node, const char *uname,
int depth, void *data);
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