From 3c726f8dee6f55e96475574e9f645327e461884c Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 7 Nov 2005 11:06:55 +1100 Subject: [PATCH] ppc64: support 64k pages Adds a new CONFIG_PPC_64K_PAGES which, when enabled, changes the kernel base page size to 64K. The resulting kernel still boots on any hardware. On current machines with 4K pages support only, the kernel will maintain 16 "subpages" for each 64K page transparently. Note that while real 64K capable HW has been tested, the current patch will not enable it yet as such hardware is not released yet, and I'm still verifying with the firmware architects the proper to get the information from the newer hypervisors. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Linus Torvalds --- include/asm-powerpc/prom.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/asm-powerpc/prom.h') diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h index 3a0104fa046..7587bf5f38c 100644 --- a/include/asm-powerpc/prom.h +++ b/include/asm-powerpc/prom.h @@ -178,6 +178,14 @@ extern struct device_node *of_get_next_child(const struct device_node *node, extern struct device_node *of_node_get(struct device_node *node); extern void of_node_put(struct device_node *node); +/* For scanning the flat device-tree at boot time */ +int __init of_scan_flat_dt(int (*it)(unsigned long node, + const char *uname, int depth, + void *data), + void *data); +void* __init of_get_flat_dt_prop(unsigned long node, const char *name, + unsigned long *size); + /* For updating the device tree at runtime */ extern void of_attach_node(struct device_node *); extern void of_detach_node(const struct device_node *); -- cgit v1.2.3