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[PATCH] ps3: Preallocate bootmem memory for ps3fb

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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>
This commit is contained in:
Geert Uytterhoeven 2007-02-12 00:55:22 -08:00 committed by Linus Torvalds
parent dcfe2666ff
commit fbdb3e5be3
2 changed files with 51 additions and 0 deletions
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42
arch/powerpc/platforms/ps3/setup.c
View File

@ -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__);

9
include/asm-powerpc/ps3.h
View File

@ -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