ARM: OMAP: FB sync with N800 tree (support for dynamic SRAM allocations)
- in addition to fixed FB regions - as passed by the bootloader -
allow dynamic allocations
- do some more checking against overlapping / reserved regions
- move the FB specific parts out from sram.c to fb.c
Signed-off-by: Imre Deak <imre.deak@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index 7e5f887..bc46f33 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -51,10 +51,14 @@
static unsigned long omap_sram_size;
static unsigned long omap_sram_ceil;
-int omap_fb_sram_plane = -1;
-int omap_fb_sram_valid;
+extern unsigned long omapfb_reserve_sram(unsigned long sram_pstart,
+ unsigned long sram_vstart,
+ unsigned long sram_size,
+ unsigned long pstart_avail,
+ unsigned long size_avail);
-/* Depending on the target RAMFS firewall setup, the public usable amount of
+/*
+ * Depending on the target RAMFS firewall setup, the public usable amount of
* SRAM varies. The default accessable size for all device types is 2k. A GP
* device allows ARM11 but not other initators for full size. This
* functionality seems ok until some nice security API happens.
@@ -78,45 +82,6 @@
return 1; /* assume locked with no PPA or security driver */
}
-static int get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
- unsigned long *start, int *plane_idx)
-{
- const struct omap_fbmem_config *fbmem_conf;
- unsigned long size = 0;
- int i;
-
- i = 0;
- *start = 0;
- *plane_idx = -1;
- while ((fbmem_conf = omap_get_nr_config(OMAP_TAG_FBMEM,
- struct omap_fbmem_config, i)) != NULL) {
- u32 paddr, end;
-
- paddr = fbmem_conf->start;
- end = fbmem_conf->start + fbmem_conf->size;
- if (paddr > omap_sram_start &&
- paddr < omap_sram_start + omap_sram_size) {
- if (*plane_idx != -1 || paddr < start_avail ||
- paddr == end ||
- end > start_avail + size_avail) {
- printk(KERN_ERR "invalid FB SRAM configuration");
- *start = 0;
- return -1;
- }
- *plane_idx = i;
- *start = fbmem_conf->start;
- size = fbmem_conf->size;
- }
- i++;
- }
-
- if (*plane_idx >= 0)
- pr_info("Reserving %lu bytes SRAM frame buffer "
- "for plane %d\n", size, *plane_idx);
-
- return 0;
-}
-
/*
* The amount of SRAM depends on the core type.
* Note that we cannot try to test for SRAM here because writes
@@ -125,7 +90,7 @@
*/
void __init omap_detect_sram(void)
{
- unsigned long fb_sram_start;
+ unsigned long reserved;
if (cpu_is_omap24xx()) {
if (is_sram_locked()) {
@@ -158,13 +123,11 @@
omap_sram_size = 0x4000;
}
}
- if (get_fb_sram_conf(omap_sram_start + SRAM_BOOTLOADER_SZ,
- omap_sram_size - SRAM_BOOTLOADER_SZ,
- &fb_sram_start, &omap_fb_sram_plane) == 0)
- omap_fb_sram_valid = 1;
- if (omap_fb_sram_valid && omap_fb_sram_plane >= 0)
- omap_sram_size -= omap_sram_start + omap_sram_size -
- fb_sram_start;
+ reserved = omapfb_reserve_sram(omap_sram_start, omap_sram_base,
+ omap_sram_size,
+ omap_sram_start + SRAM_BOOTLOADER_SZ,
+ omap_sram_size - SRAM_BOOTLOADER_SZ);
+ omap_sram_size -= reserved;
omap_sram_ceil = omap_sram_base + omap_sram_size;
}