From 06d336cca284cc767a095ce40afca79b4aa0ecb0 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 11 Mar 2016 22:06:55 -0700 Subject: x86: Create a common header for Intel register access There are several blocks of registers that are accessed from all over the code on Intel CPUs. These don't currently have their own driver and it is not clear whether having a driver makes sense. An example is the Memory Controller Hub (MCH). We map it to a known location on some Intel chips (mostly those without FSP - Firmware Support Package). Add a new header file for these registers, and move MCH into it. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- arch/x86/include/asm/arch-ivybridge/sandybridge.h | 3 --- arch/x86/include/asm/intel_regs.h | 15 +++++++++++++++ 2 files changed, 15 insertions(+), 3 deletions(-) create mode 100644 arch/x86/include/asm/intel_regs.h (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/arch-ivybridge/sandybridge.h b/arch/x86/include/asm/arch-ivybridge/sandybridge.h index d137d6786a..59b05cc72e 100644 --- a/arch/x86/include/asm/arch-ivybridge/sandybridge.h +++ b/arch/x86/include/asm/arch-ivybridge/sandybridge.h @@ -38,7 +38,6 @@ #define IED_SIZE 0x400000 /* Northbridge BARs */ -#define DEFAULT_MCHBAR 0xfed10000 /* 16 KB */ #define DEFAULT_DMIBAR 0xfed18000 /* 4 KB */ #define DEFAULT_EPBAR 0xfed19000 /* 4 KB */ #define DEFAULT_RCBABASE 0xfed1c000 @@ -97,8 +96,6 @@ /* * MCHBAR */ -#define MCHBAR_REG(reg) (DEFAULT_MCHBAR + (reg)) - #define SSKPD 0x5d14 /* 16bit (scratchpad) */ #define BIOS_RESET_CPL 0x5da8 /* 8bit */ diff --git a/arch/x86/include/asm/intel_regs.h b/arch/x86/include/asm/intel_regs.h new file mode 100644 index 0000000000..9725738143 --- /dev/null +++ b/arch/x86/include/asm/intel_regs.h @@ -0,0 +1,15 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef __ASM_INTEL_REGS_H +#define __ASM_INTEL_REGS_H + +/* Access the memory-controller hub */ +#define MCH_BASE_ADDRESS 0xfed10000 +#define MCH_BASE_SIZE 0x8000 +#define MCHBAR_REG(reg) (MCH_BASE_ADDRESS + (reg)) + +#endif -- cgit