summaryrefslogtreecommitdiffstats
path: root/arch/arm/plat-omap/fb.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-omap/fb.c')
-rw-r--r--arch/arm/plat-omap/fb.c77
1 files changed, 56 insertions, 21 deletions
diff --git a/arch/arm/plat-omap/fb.c b/arch/arm/plat-omap/fb.c
index d3eea4f47533..0054b9501a53 100644
--- a/arch/arm/plat-omap/fb.c
+++ b/arch/arm/plat-omap/fb.c
@@ -26,7 +26,7 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/platform_device.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/io.h>
#include <linux/omapfb.h>
@@ -171,49 +171,78 @@ static int check_fbmem_region(int region_idx, struct omapfb_mem_region *rg,
return 0;
}
+static int valid_sdram(unsigned long addr, unsigned long size)
+{
+ struct memblock_property res;
+
+ res.base = addr;
+ res.size = size;
+ return !memblock_find(&res) && res.base == addr && res.size == size;
+}
+
+static int reserve_sdram(unsigned long addr, unsigned long size)
+{
+ if (memblock_is_region_reserved(addr, size))
+ return -EBUSY;
+ if (memblock_reserve(addr, size))
+ return -ENOMEM;
+ return 0;
+}
+
/*
* Called from map_io. We need to call to this early enough so that we
* can reserve the fixed SDRAM regions before VM could get hold of them.
*/
-void __init omapfb_reserve_sdram(void)
+void __init omapfb_reserve_sdram_memblock(void)
{
- struct bootmem_data *bdata;
- unsigned long sdram_start, sdram_size;
- unsigned long reserved;
- int i;
+ unsigned long reserved = 0;
+ int i;
if (config_invalid)
return;
- bdata = NODE_DATA(0)->bdata;
- sdram_start = bdata->node_min_pfn << PAGE_SHIFT;
- sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start;
- reserved = 0;
for (i = 0; ; i++) {
- struct omapfb_mem_region rg;
+ struct omapfb_mem_region rg;
if (get_fbmem_region(i, &rg) < 0)
break;
+
if (i == OMAPFB_PLANE_NUM) {
- printk(KERN_ERR
- "Extraneous FB mem configuration entries\n");
+ pr_err("Extraneous FB mem configuration entries\n");
config_invalid = 1;
return;
}
+
/* Check if it's our memory type. */
- if (set_fbmem_region_type(&rg, OMAPFB_MEMTYPE_SDRAM,
- sdram_start, sdram_size) < 0 ||
- (rg.type != OMAPFB_MEMTYPE_SDRAM))
+ if (rg.type != OMAPFB_MEMTYPE_SDRAM)
continue;
- BUG_ON(omapfb_config.mem_desc.region[i].size);
- if (check_fbmem_region(i, &rg, sdram_start, sdram_size) < 0) {
+
+ /* Check if the region falls within SDRAM */
+ if (rg.paddr && !valid_sdram(rg.paddr, rg.size))
+ continue;
+
+ if (rg.size == 0) {
+ pr_err("Zero size for FB region %d\n", i);
config_invalid = 1;
return;
}
+
if (rg.paddr) {
- reserve_bootmem(rg.paddr, rg.size, BOOTMEM_DEFAULT);
+ if (reserve_sdram(rg.paddr, rg.size)) {
+ pr_err("Trying to use reserved memory for FB region %d\n",
+ i);
+ config_invalid = 1;
+ return;
+ }
reserved += rg.size;
}
+
+ if (omapfb_config.mem_desc.region[i].size) {
+ pr_err("FB region %d already set\n", i);
+ config_invalid = 1;
+ return;
+ }
+
omapfb_config.mem_desc.region[i] = rg;
configured_regions++;
}
@@ -359,7 +388,10 @@ static inline int omap_init_fb(void)
arch_initcall(omap_init_fb);
-void omapfb_reserve_sdram(void) {}
+void omapfb_reserve_sdram_memblock(void)
+{
+}
+
unsigned long omapfb_reserve_sram(unsigned long sram_pstart,
unsigned long sram_vstart,
unsigned long sram_size,
@@ -375,7 +407,10 @@ void omapfb_set_platform_data(struct omapfb_platform_data *data)
{
}
-void omapfb_reserve_sdram(void) {}
+void omapfb_reserve_sdram_memblock(void)
+{
+}
+
unsigned long omapfb_reserve_sram(unsigned long sram_pstart,
unsigned long sram_vstart,
unsigned long sram_size,