aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/plat-omap/io.c
diff options
context:
space:
mode:
authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-09-04 12:07:44 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-09-05 17:02:29 +0100
commit690b5a13b27ba3bb2c9d61c1f4018c5074b591e6 (patch)
tree45b491850fdc5282e5b1c496697b5738d1fbc172 /arch/arm/plat-omap/io.c
parente5480b7397f497482083da056f5f300dd4ca43f3 (diff)
[ARM] omap: allow ioremap() to use our fixed IO mappings
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-omap/io.c')
-rw-r--r--arch/arm/plat-omap/io.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/io.c b/arch/arm/plat-omap/io.c
new file mode 100644
index 00000000000..0253c456ed5
--- /dev/null
+++ b/arch/arm/plat-omap/io.c
@@ -0,0 +1,83 @@
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/mm.h>
+
+#include <mach/omap730.h>
+#include <mach/omap1510.h>
+#include <mach/omap16xx.h>
+#include <mach/omap24xx.h>
+#include <mach/omap34xx.h>
+
+#define BETWEEN(p,st,sz) ((p) >= (st) && (p) < ((st) + (sz)))
+#define XLATE(p,pst,vst) ((void __iomem *)((p) - (pst) + (vst)))
+
+/*
+ * Intercept ioremap() requests for addresses in our fixed mapping regions.
+ */
+void __iomem *omap_ioremap(unsigned long p, size_t size, unsigned int type)
+{
+#ifdef CONFIG_ARCH_OMAP1
+ if (cpu_class_is_omap1()) {
+ if (BETWEEN(p, IO_PHYS, IO_SIZE))
+ return XLATE(p, IO_PHYS, IO_VIRT);
+ }
+ if (cpu_is_omap730()) {
+ if (BETWEEN(p, OMAP730_DSP_BASE, OMAP730_DSP_SIZE))
+ return XLATE(p, OMAP730_DSP_BASE, OMAP730_DSP_START);
+
+ if (BETWEEN(p, OMAP730_DSPREG_BASE, OMAP730_DSPREG_SIZE))
+ return XLATE(p, OMAP730_DSPREG_BASE,
+ OMAP730_DSPREG_START);
+ }
+ if (cpu_is_omap15xx()) {
+ if (BETWEEN(p, OMAP1510_DSP_BASE, OMAP1510_DSP_SIZE))
+ return XLATE(p, OMAP1510_DSP_BASE, OMAP1510_DSP_START);
+
+ if (BETWEEN(p, OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_SIZE))
+ return XLATE(p, OMAP1510_DSPREG_BASE,
+ OMAP1510_DSPREG_START);
+ }
+ if (cpu_is_omap16xx()) {
+ if (BETWEEN(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_SIZE))
+ return XLATE(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_START);
+
+ if (BETWEEN(p, OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_SIZE))
+ return XLATE(p, OMAP16XX_DSPREG_BASE,
+ OMAP16XX_DSPREG_START);
+ }
+#endif
+#ifdef CONFIG_ARCH_OMAP2
+ if (cpu_class_is_omap2()) {
+ if (BETWEEN(p, L3_24XX_PHYS, L3_24XX_SIZE))
+ return XLATE(p, L3_24XX_PHYS, L3_24XX_VIRT);
+ if (BETWEEN(p, L4_24XX_PHYS, L4_24XX_SIZE))
+ return XLATE(p, L4_24XX_PHYS, L4_24XX_VIRT);
+ if (BETWEEN(p, DSP_MEM_24XX_PHYS, DSP_MEM_24XX_SIZE))
+ return XLATE(p, DSP_MEM_24XX_PHYS, DSP_MEM_24XX_VIRT);
+ if (BETWEEN(p, DSP_IPI_24XX_PHYS, DSP_IPI_24XX_SIZE))
+ return XLATE(p, DSP_IPI_24XX_PHYS, DSP_IPI_24XX_SIZE);
+ if (BETWEEN(p, DSP_MMU_24XX_PHYS, DSP_MMU_24XX_SIZE))
+ return XLATE(p, DSP_MMU_24XX_PHYS, DSP_MMU_24XX_VIRT);
+ }
+#ifdef CONFIG_ARCH_OMAP2430
+ if (cpu_is_omap2430()) {
+ if (BETWEEN(p, L4_WK_243X_PHYS, L4_WK_243X_SIZE))
+ return XLATE(L4_WK_243X_PHYS, L4_WK_243X_VIRT);
+ if (BETWEEN(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_SIZE))
+ return XLATE(OMAP243X_GPMC_PHYS, OMAP243X_GPMC_VIRT);
+ }
+#endif
+#endif
+
+ return __arm_ioremap(p, size, type);
+}
+EXPORT_SYMBOL(omap_ioremap);
+
+void omap_iounmap(volatile void __iomem *addr)
+{
+ unsigned long virt = (unsigned long)addr;
+
+ if (virt >= VMALLOC_START && virt < VMALLOC_END)
+ __iounmap(addr);
+}
+EXPORT_SYMBOL(omap_iounmap);