path: root/src/arch/arm/include/arch/io.h
diff options
authorGabe Black <gabeblack@google.com>2013-09-30 23:00:33 -0700
committerIsaac Christensen <isaac.christensen@se-eng.com>2014-09-08 18:59:23 +0200
commit51edd54738b2248e92580caa317aa4e8e1694d40 (patch)
treed10c6be921f2d3656d9f504f4572a1c73f7860e3 /src/arch/arm/include/arch/io.h
parent94b4a266fb4df1f2f59ed8052c150ee4bf3e6d41 (diff)
ARM: Generalize armv7 as arm.
There are ARM systems which are essentially heterogeneous multicores where some cores implement a different ARM architecture version than other cores. A specific example is the tegra124 which boots on an ARMv4 coprocessor while most code, including most of the firmware, runs on the main ARMv7 core. To support SOCs like this, the plan is to generalize the ARM architecture so that all versions are available, and an SOC/CPU can then select what architecture variant should be used for each component of the firmware; bootblock, romstage, and ramstage. Old-Change-Id: I22e048c3bc72bd56371e14200942e436c1e312c2 Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: https://chromium-review.googlesource.com/171338 Reviewed-by: Gabe Black <gabeblack@chromium.org> Commit-Queue: Gabe Black <gabeblack@chromium.org> Tested-by: Gabe Black <gabeblack@chromium.org> (cherry picked from commit 8423a41529da0ff67fb9873be1e2beb30b09ae2d) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> ARM: Split out ARMv7 code and make it possible to have other arch versions. We don't always want to use ARMv7 code when building for ARM, so we should separate out the ARMv7 code so it can be excluded, and also make it possible to include code for some other version of the architecture instead, all per build component for cases where we need more than one architecture version at a time. The tegra124 bootblock will ultimately need to be ARMv4, but until we have some ARMv4 code to switch over to we can leave it set to ARMv7. Old-Change-Id: Ia982c91057fac9c252397b7c866224f103761cc7 Reviewed-on: https://chromium-review.googlesource.com/171400 Reviewed-by: Gabe Black <gabeblack@chromium.org> Tested-by: Gabe Black <gabeblack@chromium.org> Commit-Queue: Gabe Black <gabeblack@chromium.org> (cherry picked from commit 799514e6060aa97acdcf081b5c48f965be134483) Squashed two related patches for splitting ARM support into general ARM support and ARMv7 specific pieces. Change-Id: Ic6511507953a2223c87c55f90252c4a4e1dd6010 Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6782 Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch/arm/include/arch/io.h')
1 files changed, 94 insertions, 0 deletions
diff --git a/src/arch/arm/include/arch/io.h b/src/arch/arm/include/arch/io.h
new file mode 100644
index 000000000..e53729708
--- /dev/null
+++ b/src/arch/arm/include/arch/io.h
@@ -0,0 +1,94 @@
+ * Originally imported from linux/include/asm-arm/io.h. This file has changed
+ * substantially since then.
+ *
+ * Copyright 2013 Google Inc.
+ * Copyright (C) 1996-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Modifications:
+ * 08-Apr-2013 G Replaced several macros with inlines for type safety.
+ * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
+ * constant addresses and variable addresses.
+ * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
+ * specific IO header files.
+ * 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
+ * 04-Apr-1999 PJB Added check_signature.
+ * 12-Dec-1999 RMK More cleanups
+ * 18-Jun-2000 RMK Removed virt_to_* and friends definitions
+ */
+#ifndef __ASM_ARM_IO_H
+#define __ASM_ARM_IO_H
+#include <arch/byteorder.h>
+#include <arch/arch_io.h>
+#include <stdint.h>
+ * FIXME: These are to avoid breaking existing ARM code. We should eventually
+ * re-factor all code to specify the data length intended.
+ */
+#define readb(a) read8(a)
+#define writeb(v,a) write8(v,a)
+#define readl(a) read32(a)
+#define writel(v,a) write32(v,a)
+ * Clear and set bits in one shot. These macros can be used to clear and
+ * set multiple bits in a register using a single call. These macros can
+ * also be used to set a multiple-bit bit pattern using a mask, by
+ * specifying the mask in the 'clear' parameter and the new bit pattern
+ * in the 'set' parameter.
+ */
+#define out_arch(type,endian,a,v) write##type(cpu_to_##endian(v),a)
+#define in_arch(type,endian,a) endian##_to_cpu(read##type(a))
+#define out_le32(a,v) out_arch(l,le32,a,v)
+#define out_le16(a,v) out_arch(w,le16,a,v)
+#define in_le32(a) in_arch(l,le32,a)
+#define in_le16(a) in_arch(w,le16,a)
+#define out_be32(a,v) out_arch(l,be32,a,v)
+#define out_be16(a,v) out_arch(w,be16,a,v)
+#define in_be32(a) in_arch(l,be32,a)
+#define in_be16(a) in_arch(w,be16,a)
+#define out_8(a,v) writeb(v,a)
+#define in_8(a) readb(a)
+#define clrbits(type, addr, clear) \
+ out_##type((addr), in_##type(addr) & ~(clear))
+#define setbits(type, addr, set) \
+ out_##type((addr), in_##type(addr) | (set))
+#define clrsetbits(type, addr, clear, set) \
+ out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
+#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
+#define setbits_be32(addr, set) setbits(be32, addr, set)
+#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
+#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
+#define setbits_le32(addr, set) setbits(le32, addr, set)
+#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
+#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
+#define setbits_be16(addr, set) setbits(be16, addr, set)
+#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
+#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
+#define setbits_le16(addr, set) setbits(le16, addr, set)
+#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
+#define clrbits_8(addr, clear) clrbits(8, addr, clear)
+#define setbits_8(addr, set) setbits(8, addr, set)
+#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
+#endif /* __ASM_ARM_IO_H */