[ARM] 4303/3: base kernel support for TI DaVinci

Add base kernel support for the TI DaVinci platform.

This patch only includes interrupts, timers, CPU identification,
serial support and basic power and sleep controller init.  More
drivers to come.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 79 insertions, 0 deletions

diff --git a/include/asm-arm/arch-davinci/io.h b/include/asm-arm/arch-davinci/io.h
new file mode 100644
index 000000000000..e7accb910864
--- /dev/null
+++ b/include/asm-arm/arch-davinci/io.h
@@ -0,0 +1,79 @@
+/*
+ * DaVinci IO address definitions
+ *
+ * Copied from include/asm/arm/arch-omap/io.h
+ *
+ * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#ifndef __ASM_ARCH_IO_H
+#define __ASM_ARCH_IO_H
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/*
+ * ----------------------------------------------------------------------------
+ * I/O mapping
+ * ----------------------------------------------------------------------------
+ */
+#define IO_PHYS         0x01c00000
+#define IO_OFFSET       0xfd000000 /* Virtual IO = 0xfec00000 */
+#define IO_SIZE         0x00400000
+#define IO_VIRT         (IO_PHYS + IO_OFFSET)
+#define io_p2v(pa)      ((pa) + IO_OFFSET)
+#define io_v2p(va)      ((va) - IO_OFFSET)
+#define IO_ADDRESS(x)   io_p2v(x)
+
+/*
+ * We don't actually have real ISA nor PCI buses, but there is so many
+ * drivers out there that might just work if we fake them...
+ */
+#define PCIO_BASE               0
+#define __io(a)                 ((void __iomem *)(PCIO_BASE + (a)))
+#define __mem_pci(a)            (a)
+#define __mem_isa(a)            (a)
+
+#ifndef __ASSEMBLER__
+
+/*
+ * Functions to access the DaVinci IO region
+ *
+ * NOTE: - Use davinci_read/write[bwl] for physical register addresses
+ *       - Use __raw_read/write[bwl]() for virtual register addresses
+ *       - Use IO_ADDRESS(phys_addr) to convert registers to virtual addresses
+ *       - DO NOT use hardcoded virtual addresses to allow changing the
+ *         IO address space again if needed
+ */
+#define davinci_readb(a)        (*(volatile unsigned char  *)IO_ADDRESS(a))
+#define davinci_readw(a)        (*(volatile unsigned short *)IO_ADDRESS(a))
+#define davinci_readl(a)        (*(volatile unsigned int   *)IO_ADDRESS(a))
+
+#define davinci_writeb(v,a)     (*(volatile unsigned char  *)IO_ADDRESS(a) = (v))
+#define davinci_writew(v,a)     (*(volatile unsigned short *)IO_ADDRESS(a) = (v))
+#define davinci_writel(v,a)     (*(volatile unsigned int   *)IO_ADDRESS(a) = (v))
+
+/* 16 bit uses LDRH/STRH, base +/- offset_8 */
+typedef struct { volatile u16 offset[256]; } __regbase16;
+#define __REGV16(vaddr)         ((__regbase16 *)((vaddr)&~0xff)) \
+                                        ->offset[((vaddr)&0xff)>>1]
+#define __REG16(paddr)          __REGV16(io_p2v(paddr))
+
+/* 8/32 bit uses LDR/STR, base +/- offset_12 */
+typedef struct { volatile u8 offset[4096]; } __regbase8;
+#define __REGV8(vaddr)          ((__regbase8  *)((vaddr)&~4095)) \
+                                        ->offset[((vaddr)&4095)>>0]
+#define __REG8(paddr)           __REGV8(io_p2v(paddr))
+
+typedef struct { volatile u32 offset[4096]; } __regbase32;
+#define __REGV32(vaddr)         ((__regbase32 *)((vaddr)&~4095)) \
+                                        ->offset[((vaddr)&4095)>>2]
+
+#define __REG(paddr)            __REGV32(io_p2v(paddr))
+#else
+
+#define __REG(x)        (*((volatile unsigned long *)io_p2v(x)))
+
+#endif /* __ASSEMBLER__ */
+#endif /* __ASM_ARCH_IO_H */