Hi,
On 15.12.2015 14:20, Russell King - ARM Linux wrote:
You could also just save_atags() in there, with a comment saying that
this is a work-around for N900 which needs the ATAGs saved, and this
is allowed in ->reserve as a special exception.
What about this (just to confirm I got the idea correctly, proper patch
will follow if that's the case):
diff --git a/arch/arm/mach-omap2/board-generic.c
b/arch/arm/mach-omap2/board-generic.c
index 34ff14b..8916856 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -83,8 +83,25 @@ static const char *const n900_boards_compat[]
__initconst = {
NULL,
};
+#ifdef CONFIG_ATAGS_PROC
+extern void save_atags(const struct tag *tags);
+
+/* Legacy userspace on Nokia N900 needs ATAGS exported in /proc/atags,
+ * save them while the data is still not overwritten
+ */
+static void __init rx51_reserve(void)
+{
+ const phys_addr_t __atags_pointer = 0x100;
+
+ save_atags(phys_to_virt(__atags_pointer));
+ omap_reserve();
+}
+#else
+#define rx51_reserve omap_reserve
+#endif
+
DT_MACHINE_START(OMAP3_N900_DT, "Nokia RX-51 board")
- .reserve = omap_reserve,
+ .reserve = rx51_reserve,
.map_io = omap3_map_io,
.init_early = omap3430_init_early,
.init_machine = omap_generic_init,
--
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