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authorMichael Ellerman <michael@ellerman.id.au>2006-06-23 18:20:13 +1000
committerPaul Mackerras <paulus@samba.org>2006-06-28 11:59:48 +1000
commit458148c00b97864a27ecf528a1d45a8e5ebd9bbc (patch)
treecd32ceb1cddc32e501a1aeebd0f0f88dbdd950a5 /arch/powerpc/kernel/rtas.c
parentab3ab74d9b6b3920be70f502b40cb3f7f08d23fa (diff)
downloadop-kernel-dev-458148c00b97864a27ecf528a1d45a8e5ebd9bbc.zip
op-kernel-dev-458148c00b97864a27ecf528a1d45a8e5ebd9bbc.tar.gz
[POWERPC] Setup RTAS values earlier, to enable rtas_call() earlier
Althought RTAS is instantiated when we enter the kernel, we can't actually call into it until we know its entry point address. Currently we grab that in rtas_initialize(), however that's quite late in the boot sequence. To enable rtas_call() earlier, we can grab the RTAS entry etc. values while we're scanning the flattened device tree. There's existing code to retrieve the values from /chosen, however we don't store them there anymore, so remove that code. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/rtas.c')
-rw-r--r--arch/powerpc/kernel/rtas.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index b6aed76..061d8af 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -801,3 +801,25 @@ void __init rtas_initialize(void)
rtas_last_error_token = rtas_token("rtas-last-error");
#endif
}
+
+int __init early_init_dt_scan_rtas(unsigned long node,
+ const char *uname, int depth, void *data)
+{
+ u32 *basep, *entryp, *sizep;
+
+ if (depth != 1 || strcmp(uname, "rtas") != 0)
+ return 0;
+
+ basep = of_get_flat_dt_prop(node, "linux,rtas-base", NULL);
+ entryp = of_get_flat_dt_prop(node, "linux,rtas-entry", NULL);
+ sizep = of_get_flat_dt_prop(node, "rtas-size", NULL);
+
+ if (basep && entryp && sizep) {
+ rtas.base = *basep;
+ rtas.entry = *entryp;
+ rtas.size = *sizep;
+ }
+
+ /* break now */
+ return 1;
+}
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