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authorGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>2007-02-12 00:55:22 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:44 -0800
commitfbdb3e5be36619c4acf415d870eceab4cbce2850 (patch)
tree0bd7149180bdd261fa1e9067421ba64d1bf67d0e
parentdcfe2666ffd6316b764801db82092bc62db56e6f (diff)
[PATCH] ps3: Preallocate bootmem memory for ps3fb
Preallocate bootmem memory for the PS3 frame buffer device, which needs a large block of physically-contiguous memory. The size of this memory block is configurable: - The config option CONFIG_FB_PS3_DEFAULT_SIZE_M allows to specify the default amount of memory (in MiB) allocated to the virtual frame buffer. - The early boot parameter `ps3fb=xxx' allows to override the default value. It will be rounded up to a multiple of 1 MiB, if needed. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Cc: James Simmons <jsimmons@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/powerpc/platforms/ps3/setup.c42
-rw-r--r--include/asm-powerpc/ps3.h9
2 files changed, 51 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c
index e62505e18813..13d669a8ecae 100644
--- a/arch/powerpc/platforms/ps3/setup.c
+++ b/arch/powerpc/platforms/ps3/setup.c
@@ -24,6 +24,7 @@
#include <linux/root_dev.h>
#include <linux/console.h>
#include <linux/kexec.h>
+#include <linux/bootmem.h>
#include <asm/machdep.h>
#include <asm/firmware.h>
@@ -80,6 +81,46 @@ static void ps3_panic(char *str)
for (;;) ;
}
+
+static void prealloc(struct ps3_prealloc *p)
+{
+ if (!p->size)
+ return;
+
+ p->address = __alloc_bootmem(p->size, p->align, __pa(MAX_DMA_ADDRESS));
+ if (!p->address) {
+ printk(KERN_ERR "%s: Cannot allocate %s\n", __FUNCTION__,
+ p->name);
+ return;
+ }
+
+ printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
+ p->address);
+}
+
+#ifdef CONFIG_FB_PS3
+struct ps3_prealloc ps3fb_videomemory = {
+ .name = "ps3fb videomemory",
+ .size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
+ .align = 1024*1024 /* the GPU requires 1 MiB alignment */
+};
+#define prealloc_ps3fb_videomemory() prealloc(&ps3fb_videomemory)
+
+static int __init early_parse_ps3fb(char *p)
+{
+ if (!p)
+ return 1;
+
+ ps3fb_videomemory.size = _ALIGN_UP(memparse(p, &p),
+ ps3fb_videomemory.align);
+ return 0;
+}
+early_param("ps3fb", early_parse_ps3fb);
+#else
+#define prealloc_ps3fb_videomemory() do { } while (0)
+#endif
+
+
static void __init ps3_setup_arch(void)
{
union ps3_firmware_version v;
@@ -101,6 +142,7 @@ static void __init ps3_setup_arch(void)
conswitchp = &dummy_con;
#endif
+ prealloc_ps3fb_videomemory();
ppc_md.power_save = ps3_power_save;
DBG(" <- %s:%d\n", __func__, __LINE__);
diff --git a/include/asm-powerpc/ps3.h b/include/asm-powerpc/ps3.h
index 4f5a1e01fdac..e5982ad46576 100644
--- a/include/asm-powerpc/ps3.h
+++ b/include/asm-powerpc/ps3.h
@@ -388,4 +388,13 @@ struct ps3_vuart_port_device {
int ps3_vuart_port_device_register(struct ps3_vuart_port_device *dev);
+struct ps3_prealloc {
+ const char *name;
+ void *address;
+ unsigned long size;
+ unsigned long align;
+};
+
+extern struct ps3_prealloc ps3fb_videomemory;
+
#endif

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