Add initial EFI architecture support

This adds support for running barebox in an EFI environment
on X86 PC hardware.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

16 files changed, 438 insertions, 0 deletions

diff --git a/arch/efi/include/asm/barebox.h b/arch/efi/include/asm/barebox.h
new file mode 100644
index 0000000000..2997587d82
--- /dev/null
+++ b/arch/efi/include/asm/barebox.h
@@ -0,0 +1 @@
+/* dummy */
diff --git a/arch/efi/include/asm/bitops.h b/arch/efi/include/asm/bitops.h
new file mode 100644
index 0000000000..94646d4d0d
--- /dev/null
+++ b/arch/efi/include/asm/bitops.h
@@ -0,0 +1,15 @@
+#ifndef _SANDBOX_BITOPS_H
+#define _SANDBOX_BITOPS_H
+
+/* nothing but the defaults.. */
+#include <asm-generic/bitops/__ffs.h>
+#include <asm-generic/bitops/__fls.h>
+#include <asm-generic/bitops/ffs.h>
+#include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/ffz.h>
+#include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/ops.h>
+
+#endif
diff --git a/arch/efi/include/asm/byteorder.h b/arch/efi/include/asm/byteorder.h
new file mode 100644
index 0000000000..37316f2371
--- /dev/null
+++ b/arch/efi/include/asm/byteorder.h
@@ -0,0 +1,8 @@
+#ifndef _I386_BYTEORDER_H
+#define _I386_BYTEORDER_H
+
+#include <asm/types.h>
+
+#include <linux/byteorder/little_endian.h>
+
+#endif /* _I386_BYTEORDER_H */
diff --git a/arch/efi/include/asm/common.h b/arch/efi/include/asm/common.h
new file mode 100644
index 0000000000..b0e6b7fb18
--- /dev/null
+++ b/arch/efi/include/asm/common.h
@@ -0,0 +1,4 @@
+#ifndef ASM_COMMON_H
+#define ASM_COMMON_H
+
+#endif /* ASM_COMMON_H */
diff --git a/arch/efi/include/asm/dma.h b/arch/efi/include/asm/dma.h
new file mode 100644
index 0000000000..459536779e
--- /dev/null
+++ b/arch/efi/include/asm/dma.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2012 by Marc Kleine-Budde <mkl@pengutronix.de>
+ *
+ * This file is released under the GPLv2
+ *
+ */
+
+#ifndef __ASM_DMA_H
+#define __ASM_DMA_H
+
+/* empty*/
+
+#endif /* __ASM_DMA_H */
diff --git a/arch/efi/include/asm/elf.h b/arch/efi/include/asm/elf.h
new file mode 100644
index 0000000000..ddde035188
--- /dev/null
+++ b/arch/efi/include/asm/elf.h
@@ -0,0 +1,60 @@
+#ifndef __ASM_SANDBOX_ELF_H__
+#define __ASM_SANDBOX_ELF_H__
+
+#ifdef __i386__
+
+typedef struct user_fxsr_struct elf_fpxregset_t;
+
+#define R_386_NONE	0
+#define R_386_32	1
+#define R_386_PC32	2
+#define R_386_GOT32	3
+#define R_386_PLT32	4
+#define R_386_COPY	5
+#define R_386_GLOB_DAT	6
+#define R_386_JMP_SLOT	7
+#define R_386_RELATIVE	8
+#define R_386_GOTOFF	9
+#define R_386_GOTPC	10
+#define R_386_NUM	11
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS	ELFCLASS32
+#define ELF_DATA	ELFDATA2LSB
+#define ELF_ARCH	EM_386
+
+#else
+
+/* x86-64 relocation types */
+#define R_X86_64_NONE		0	/* No reloc */
+#define R_X86_64_64		1	/* Direct 64 bit  */
+#define R_X86_64_PC32		2	/* PC relative 32 bit signed */
+#define R_X86_64_GOT32		3	/* 32 bit GOT entry */
+#define R_X86_64_PLT32		4	/* 32 bit PLT address */
+#define R_X86_64_COPY		5	/* Copy symbol at runtime */
+#define R_X86_64_GLOB_DAT	6	/* Create GOT entry */
+#define R_X86_64_JUMP_SLOT	7	/* Create PLT entry */
+#define R_X86_64_RELATIVE	8	/* Adjust by program base */
+#define R_X86_64_GOTPCREL	9	/* 32 bit signed pc relative
+					   offset to GOT */
+#define R_X86_64_32		10	/* Direct 32 bit zero extended */
+#define R_X86_64_32S		11	/* Direct 32 bit sign extended */
+#define R_X86_64_16		12	/* Direct 16 bit zero extended */
+#define R_X86_64_PC16		13	/* 16 bit sign extended pc relative */
+#define R_X86_64_8		14	/* Direct 8 bit sign extended  */
+#define R_X86_64_PC8		15	/* 8 bit sign extended pc relative */
+
+#define R_X86_64_NUM		16
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS	ELFCLASS64
+#define ELF_DATA	ELFDATA2LSB
+#define ELF_ARCH	EM_X86_64
+
+#endif
+
+#endif /* __ASM_SANDBOX_ELF_H__ */
diff --git a/arch/efi/include/asm/io.h b/arch/efi/include/asm/io.h
new file mode 100644
index 0000000000..ac8a9c1b35
--- /dev/null
+++ b/arch/efi/include/asm/io.h
@@ -0,0 +1,55 @@
+#ifndef __ASM_SANDBOX_IO_H
+#define __ASM_SANDBOX_IO_H
+
+#define build_mmio_read(name, size, type, reg, barrier) \
+ static inline type name(const volatile void *addr) \
+ { type ret; asm volatile("mov" size " %1,%0":reg (ret) \
+ :"m" (*(volatile type*)addr) barrier); return ret; }
+
+build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
+build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
+build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
+
+#define build_mmio_write(name, size, type, reg, barrier) \
+ static inline void name(type val, volatile void *addr) \
+ { asm volatile("mov" size " %0,%1": :reg (val), \
+ "m" (*(volatile type*)addr) barrier); }
+
+build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
+build_mmio_write(writew, "w", unsigned short, "r", :"memory")
+build_mmio_write(writel, "l", unsigned int, "r", :"memory")
+
+#define BUILDIO(bwl, bw, type)						\
+static inline void out##bwl(unsigned type value, int port)		\
+{									\
+	asm volatile("out" #bwl " %" #bw "0, %w1"			\
+		     : : "a"(value), "Nd"(port));			\
+}									\
+									\
+static inline unsigned type in##bwl(int port)				\
+{									\
+	unsigned type value;						\
+	asm volatile("in" #bwl " %w1, %" #bw "0"			\
+		     : "=a"(value) : "Nd"(port));			\
+	return value;							\
+}									\
+									\
+static inline void outs##bwl(int port, const void *addr, unsigned long count) \
+{									\
+	asm volatile("rep; outs" #bwl					\
+		     : "+S"(addr), "+c"(count) : "d"(port));		\
+}									\
+									\
+static inline void ins##bwl(int port, void *addr, unsigned long count)	\
+{									\
+	asm volatile("rep; ins" #bwl					\
+		     : "+D"(addr), "+c"(count) : "d"(port));		\
+}
+
+BUILDIO(b, b, char)
+BUILDIO(w, w, short)
+BUILDIO(l, , int)
+
+#define  IO_SPACE_LIMIT  0xffff
+
+#endif /* __ASM_SANDBOX_IO_H */
diff --git a/arch/efi/include/asm/posix_types.h b/arch/efi/include/asm/posix_types.h
new file mode 100644
index 0000000000..6985b8eb4a
--- /dev/null
+++ b/arch/efi/include/asm/posix_types.h
@@ -0,0 +1,93 @@
+#ifndef __ARCH_I386_POSIX_TYPES_H
+#define __ARCH_I386_POSIX_TYPES_H
+
+/*
+ * This file is generally used by user-level software, so you need to
+ * be a little careful about namespace pollution etc.  Also, we cannot
+ * assume GCC is being used.
+ */
+
+typedef unsigned long	__kernel_ino_t;
+typedef unsigned short	__kernel_mode_t;
+typedef unsigned short	__kernel_nlink_t;
+typedef long		__kernel_off_t;
+typedef int		__kernel_pid_t;
+typedef unsigned short	__kernel_ipc_pid_t;
+typedef unsigned short	__kernel_uid_t;
+typedef unsigned short	__kernel_gid_t;
+/*
+ * Most 32 bit architectures use "unsigned int" size_t,
+ * and all 64 bit architectures use "unsigned long" size_t.
+ *
+ * TODO: It's not clean to use __x86_64__ here. It's better
+ * to check on __BITS_PER_LONG here. But this is wrong set in
+ * arch/sandbox/include/asm/types.h.
+ */
+#ifdef __x86_64__
+typedef unsigned long	__kernel_size_t;
+typedef long		__kernel_ssize_t;
+typedef long		__kernel_ptrdiff_t;
+#else
+typedef unsigned int	__kernel_size_t;
+typedef int		__kernel_ssize_t;
+typedef int		__kernel_ptrdiff_t;
+#endif
+typedef long		__kernel_time_t;
+typedef long		__kernel_suseconds_t;
+typedef long		__kernel_clock_t;
+typedef int		__kernel_daddr_t;
+typedef char *		__kernel_caddr_t;
+typedef unsigned short	__kernel_uid16_t;
+typedef unsigned short	__kernel_gid16_t;
+typedef unsigned int	__kernel_uid32_t;
+typedef unsigned int	__kernel_gid32_t;
+
+typedef unsigned short	__kernel_old_uid_t;
+typedef unsigned short	__kernel_old_gid_t;
+
+#ifdef __GNUC__
+typedef long long	__kernel_loff_t;
+#endif
+
+typedef struct {
+#if defined(__KERNEL__) || defined(__USE_ALL)
+	int	val[2];
+#else /* !defined(__KERNEL__) && !defined(__USE_ALL) */
+	int	__val[2];
+#endif /* !defined(__KERNEL__) && !defined(__USE_ALL) */
+} __kernel_fsid_t;
+
+#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
+
+#undef	__FD_SET
+#define __FD_SET(fd,fdsetp) \
+		__asm__ __volatile__("btsl %1,%0": \
+			"=m" (*(__kernel_fd_set *) (fdsetp)):"r" ((int) (fd)))
+
+#undef	__FD_CLR
+#define __FD_CLR(fd,fdsetp) \
+		__asm__ __volatile__("btrl %1,%0": \
+			"=m" (*(__kernel_fd_set *) (fdsetp)):"r" ((int) (fd)))
+
+#undef	__FD_ISSET
+#define __FD_ISSET(fd,fdsetp) (__extension__ ({ \
+		unsigned char __result; \
+		__asm__ __volatile__("btl %1,%2 ; setb %0" \
+			:"=q" (__result) :"r" ((int) (fd)), \
+			"m" (*(__kernel_fd_set *) (fdsetp))); \
+		__result; }))
+
+#undef	__FD_ZERO
+#define __FD_ZERO(fdsetp) \
+do { \
+	int __d0, __d1; \
+	__asm__ __volatile__("cld ; rep ; stosl" \
+			:"=m" (*(__kernel_fd_set *) (fdsetp)), \
+			  "=&c" (__d0), "=&D" (__d1) \
+			:"a" (0), "1" (__FDSET_LONGS), \
+			"2" ((__kernel_fd_set *) (fdsetp)) : "memory"); \
+} while (0)
+
+#endif /* defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2) */
+
+#endif
diff --git a/arch/efi/include/asm/sections.h b/arch/efi/include/asm/sections.h
new file mode 100644
index 0000000000..2b8c516038
--- /dev/null
+++ b/arch/efi/include/asm/sections.h
@@ -0,0 +1 @@
+#include <asm-generic/sections.h>
diff --git a/arch/efi/include/asm/string.h b/arch/efi/include/asm/string.h
new file mode 100644
index 0000000000..2997587d82
--- /dev/null
+++ b/arch/efi/include/asm/string.h
@@ -0,0 +1 @@
+/* dummy */
diff --git a/arch/efi/include/asm/swab.h b/arch/efi/include/asm/swab.h
new file mode 100644
index 0000000000..60a90120b6
--- /dev/null
+++ b/arch/efi/include/asm/swab.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_SWAB_H
+#define _ASM_SWAB_H
+
+/* nothing. use generic functions */
+
+#endif /* _ASM_SWAB_H */
diff --git a/arch/efi/include/asm/types.h b/arch/efi/include/asm/types.h
new file mode 100644
index 0000000000..3204448dce
--- /dev/null
+++ b/arch/efi/include/asm/types.h
@@ -0,0 +1,73 @@
+#ifndef __ASM_I386_TYPES_H
+#define __ASM_I386_TYPES_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef __x86_64__
+/*
+ * This is used in dlmalloc. On X86_64 we need it to be
+ * 64 bit
+ */
+#define INTERNAL_SIZE_T unsigned long
+
+/*
+ * This is a Kconfig variable in the Kernel, but we want to detect
+ * this during compile time, so we set it here.
+ */
+#define CONFIG_PHYS_ADDR_T_64BIT
+
+#endif
+
+typedef unsigned short umode_t;
+
+/*
+ * __xx is ok: it doesn't pollute the POSIX namespace. Use these in the
+ * header files exported to user space
+ */
+
+typedef __signed__ char __s8;
+typedef unsigned char __u8;
+
+typedef __signed__ short __s16;
+typedef unsigned short __u16;
+
+typedef __signed__ int __s32;
+typedef unsigned int __u32;
+
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
+typedef __signed__ long long __s64;
+typedef unsigned long long __u64;
+#endif
+
+/*
+ * These aren't exported outside the kernel to avoid name space clashes
+ */
+#ifdef __KERNEL__
+
+typedef signed char s8;
+typedef unsigned char u8;
+
+typedef signed short s16;
+typedef unsigned short u16;
+
+typedef signed int s32;
+typedef unsigned int u32;
+
+typedef signed long long s64;
+typedef unsigned long long u64;
+
+#ifdef __x86_64__
+#define BITS_PER_LONG 64
+#else
+#define BITS_PER_LONG 32
+#endif
+
+/* Dma addresses are 32-bits wide.  */
+
+typedef u32 dma_addr_t;
+
+#endif /* __KERNEL__ */
+
+#endif
+
+#endif
diff --git a/arch/efi/include/asm/unaligned.h b/arch/efi/include/asm/unaligned.h
new file mode 100644
index 0000000000..d02da6e60d
--- /dev/null
+++ b/arch/efi/include/asm/unaligned.h
@@ -0,0 +1,19 @@
+#ifndef _ASM_SANDBOX_UNALIGNED_H
+#define _ASM_SANDBOX_UNALIGNED_H
+
+/*
+ * The architecture sandbox is compiled on can do unaligned accesses itself.
+ */
+
+#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned/generic.h>
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
+#else
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
+#endif
+
+#endif /* _ASM_SANDBOX_UNALIGNED_H */
diff --git a/arch/efi/include/mach/debug_ll.h b/arch/efi/include/mach/debug_ll.h
new file mode 100644
index 0000000000..0fb2cb8c2a
--- /dev/null
+++ b/arch/efi/include/mach/debug_ll.h
@@ -0,0 +1,20 @@
+#ifndef __MACH_DEBUG_LL_H__
+#define __MACH_DEBUG_LL_H__
+
+#define EFI_DEBUG 0
+#define EFI_DEBUG_CLEAR_MEMORY 0
+
+#include <efi.h>
+#include <mach/efi.h>
+
+static inline void PUTC_LL(char c)
+{
+	uint16_t str[2] = {};
+	struct efi_simple_text_output_protocol *con_out = efi_sys_table->con_out;
+
+	str[0] = c;
+
+	con_out->output_string(con_out, str);
+}
+
+#endif
diff --git a/arch/efi/include/mach/efi-device.h b/arch/efi/include/mach/efi-device.h
new file mode 100644
index 0000000000..fe074a44bb
--- /dev/null
+++ b/arch/efi/include/mach/efi-device.h
@@ -0,0 +1,45 @@
+#ifndef __MACH_EFI_DEVICE_H
+#define __MACH_EFI_DEVICE_H
+
+struct efi_device {
+	struct device_d dev;
+	efi_guid_t *guids;
+	int num_guids;
+	efi_handle_t handle;
+	efi_handle_t parent_handle;
+	void *protocol;
+	struct efi_device_path *devpath;
+};
+
+struct efi_driver {
+	struct driver_d driver;
+	int (*probe)(struct efi_device *efidev);
+	void (*remove)(struct efi_device *efidev);
+	efi_guid_t guid;
+};
+
+extern struct bus_type efi_bus;
+
+static inline struct efi_device *to_efi_device(struct device_d *dev)
+{
+	return container_of(dev, struct efi_device, dev);
+}
+
+static inline struct efi_driver *to_efi_driver(struct driver_d *drv)
+{
+	return container_of(drv, struct efi_driver, driver);
+}
+
+#define device_efi_driver(drv)	\
+	register_driver_macro(device, efi, drv)
+
+static inline int efi_driver_register(struct efi_driver *efidrv)
+{
+	efidrv->driver.bus = &efi_bus;
+	return register_driver(&efidrv->driver);
+}
+
+int efi_connect_all(void);
+void efi_register_devices(void);
+
+#endif /* __MACH_EFI_DEVICE_H */
diff --git a/arch/efi/include/mach/efi.h b/arch/efi/include/mach/efi.h
new file mode 100644
index 0000000000..1e9782a136
--- /dev/null
+++ b/arch/efi/include/mach/efi.h
@@ -0,0 +1,24 @@
+#ifndef __MACH_EFI_H
+#define __MACH_EFI_H
+
+#include <efi.h>
+
+const char *efi_strerror(efi_status_t err);
+
+extern efi_system_table_t *efi_sys_table;
+extern efi_handle_t efi_parent_image;
+extern struct efi_device_path *efi_device_path;
+extern efi_loaded_image_t *efi_loaded_image;
+
+int efi_errno(efi_status_t err);
+
+int efi_clocksource_init(void);
+
+void *efi_get_variable(char *name, efi_guid_t *vendor, int *var_size);
+
+static inline void *efi_get_global_var(char *name, int *var_size)
+{
+	return efi_get_variable(name, &efi_global_variable_guid, var_size);
+}
+
+#endif /* __MACH_EFI_H */