* published by the Free Software Foundation.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <asm/mach/map.h>
#include <asm/tlb.h>
#include <asm/io.h>
#include <asm/cacheflush.h>
+#include <asm/mach/map.h>
+
#include <asm/arch/sram.h>
+#include <asm/arch/board.h>
#define OMAP1_SRAM_PA 0x20000000
#define OMAP1_SRAM_VA 0xd0000000
#define OMAP2_SRAM_PA 0x40200000
+#define OMAP2_SRAM_PUB_PA 0x4020f800
#define OMAP2_SRAM_VA 0xd0000000
+#define OMAP2_SRAM_PUB_VA 0xd0000800
+#if defined(CONFIG_ARCH_OMAP24XX)
+#define SRAM_BOOTLOADER_SZ 0x00
+#else
#define SRAM_BOOTLOADER_SZ 0x80
+#endif
+
+#define VA_REQINFOPERM0 IO_ADDRESS(0x68005048)
+#define VA_READPERM0 IO_ADDRESS(0x68005050)
+#define VA_WRITEPERM0 IO_ADDRESS(0x68005058)
+#define VA_CONTROL_STAT IO_ADDRESS(0x480002F8)
+#define GP_DEVICE 0x300
+#define TYPE_MASK 0x700
+
+#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
static unsigned long omap_sram_base;
static unsigned long omap_sram_size;
static unsigned long omap_sram_ceil;
+unsigned long omap_fb_sram_start;
+unsigned long omap_fb_sram_size;
+
+/* 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.
+ */
+static int is_sram_locked(void)
+{
+ int type = 0;
+
+ if (cpu_is_omap242x())
+ type = __raw_readl(VA_CONTROL_STAT) & TYPE_MASK;
+
+ if (type == GP_DEVICE) {
+ /* RAMFW: R/W access to all initators for all qualifier sets */
+ if (cpu_is_omap242x()) {
+ __raw_writel(0xFF, VA_REQINFOPERM0); /* all q-vects */
+ __raw_writel(0xCFDE, VA_READPERM0); /* all i-read */
+ __raw_writel(0xCFDE, VA_WRITEPERM0); /* all i-write */
+ }
+ return 0;
+ } else
+ return 1; /* assume locked with no PPA or security driver */
+}
+
+void get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
+ unsigned long *start, unsigned long *size)
+{
+ const struct omap_fbmem_config *fbmem_conf;
+
+ fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
+ if (fbmem_conf != NULL) {
+ *start = fbmem_conf->fb_sram_start;
+ *size = fbmem_conf->fb_sram_size;
+ } else {
+ *size = 0;
+ *start = 0;
+ }
+
+ if (*size && (
+ *start < start_avail ||
+ *start + *size > start_avail + size_avail)) {
+ printk(KERN_ERR "invalid FB SRAM configuration\n");
+ *start = start_avail;
+ *size = size_avail;
+ }
+
+ if (*size)
+ pr_info("Reserving %lu bytes SRAM for frame buffer\n", *size);
+}
+
/*
* The amount of SRAM depends on the core type.
* Note that we cannot try to test for SRAM here because writes
*/
void __init omap_detect_sram(void)
{
- if (!cpu_is_omap24xx())
+ unsigned long sram_start;
+
+ if (cpu_is_omap24xx()) {
+ if (is_sram_locked()) {
+ omap_sram_base = OMAP2_SRAM_PUB_VA;
+ sram_start = OMAP2_SRAM_PUB_PA;
+ omap_sram_size = 0x800; /* 2K */
+ } else {
+ omap_sram_base = OMAP2_SRAM_VA;
+ sram_start = OMAP2_SRAM_PA;
+ if (cpu_is_omap242x())
+ omap_sram_size = 0xa0000; /* 640K */
+ else if (cpu_is_omap243x())
+ omap_sram_size = 0x10000; /* 64K */
+ }
+ } else {
omap_sram_base = OMAP1_SRAM_VA;
- else
- omap_sram_base = OMAP2_SRAM_VA;
-
- if (cpu_is_omap730())
- omap_sram_size = 0x32000; /* 200K */
- else if (cpu_is_omap15xx())
- omap_sram_size = 0x30000; /* 192K */
- else if (cpu_is_omap1610() || cpu_is_omap1621() || cpu_is_omap1710())
- omap_sram_size = 0x4000; /* 16K */
- else if (cpu_is_omap1611())
- omap_sram_size = 0x3e800; /* 250K */
- else if (cpu_is_omap2420())
- omap_sram_size = 0xa0014; /* 640K */
- else {
- printk(KERN_ERR "Could not detect SRAM size\n");
- omap_sram_size = 0x4000;
+ sram_start = OMAP1_SRAM_PA;
+
+ if (cpu_is_omap730())
+ omap_sram_size = 0x32000; /* 200K */
+ else if (cpu_is_omap15xx())
+ omap_sram_size = 0x30000; /* 192K */
+ else if (cpu_is_omap1610() || cpu_is_omap1621() ||
+ cpu_is_omap1710())
+ omap_sram_size = 0x4000; /* 16K */
+ else if (cpu_is_omap1611())
+ omap_sram_size = 0x3e800; /* 250K */
+ else {
+ printk(KERN_ERR "Could not detect SRAM size\n");
+ omap_sram_size = 0x4000;
+ }
}
-
+ get_fb_sram_conf(sram_start + SRAM_BOOTLOADER_SZ,
+ omap_sram_size - SRAM_BOOTLOADER_SZ,
+ &omap_fb_sram_start, &omap_fb_sram_size);
+ if (omap_fb_sram_size)
+ omap_sram_size -= sram_start + omap_sram_size -
+ omap_fb_sram_start;
omap_sram_ceil = omap_sram_base + omap_sram_size;
}
{ /* .length gets filled in at runtime */
.virtual = OMAP1_SRAM_VA,
.pfn = __phys_to_pfn(OMAP1_SRAM_PA),
- .type = MT_DEVICE
+ .type = MT_MEMORY
}
};
/*
- * In order to use last 2kB of SRAM on 1611b, we must round the size
- * up to multiple of PAGE_SIZE. We cannot use ioremap for SRAM, as
- * clock init needs SRAM early.
+ * Note that we cannot use ioremap for SRAM, as clock init needs SRAM early.
*/
void __init omap_map_sram(void)
{
+ unsigned long base;
+
if (omap_sram_size == 0)
return;
if (cpu_is_omap24xx()) {
omap_sram_io_desc[0].virtual = OMAP2_SRAM_VA;
- omap_sram_io_desc[0].pfn = __phys_to_pfn(OMAP2_SRAM_PA);
+
+ if (is_sram_locked())
+ base = OMAP2_SRAM_PUB_PA;
+ else
+ base = OMAP2_SRAM_PA;
+ base = ROUND_DOWN(base, PAGE_SIZE);
+ omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
}
- omap_sram_io_desc[0].length = (omap_sram_size + PAGE_SIZE-1)/PAGE_SIZE;
- omap_sram_io_desc[0].length *= PAGE_SIZE;
+ omap_sram_io_desc[0].length = 1024 * 1024; /* Use section desc */
iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc));
printk(KERN_INFO "SRAM: Mapped pa 0x%08lx to va 0x%08lx size: 0x%lx\n",
- omap_sram_io_desc[0].pfn, omap_sram_io_desc[0].virtual,
+ __pfn_to_phys(omap_sram_io_desc[0].pfn),
+ omap_sram_io_desc[0].virtual,
omap_sram_io_desc[0].length);
/*
printk(KERN_ERR "Not enough space in SRAM\n");
return NULL;
}
+
omap_sram_ceil -= size;
- omap_sram_ceil &= ~0x3;
+ omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, sizeof(void *));
memcpy((void *)omap_sram_ceil, start, size);
return (void *)omap_sram_ceil;
git.openpandora.org / pandora-kernel.git / blobdiff