6f7a251a25
Loongson 2F has built-in DDR2 and PCI-X controller. The PCI-X controller has a programming interface similiar to the the FPGA northbridge used on Loongson 2E. The main differences between Loongson 2E and Loongson 2F include: 1. Loongson 2F has an extra address window configuration module, which is used to map CPU address space to DDR or PCI address space, or map the PCI-DMA address space to DDR or LIO address space. 2. Loongson 2F supports 8 levels of software configurable CPu frequency which can be configured in the LOONGSON_CHIPCFG0 register. The coming cpufreq and standby support are based on this feature. Loongson.h abstracts the modules and corresponding methods are abstracted. Add other Loongson-2F-specific source code including gcc 4.4 support, PCI memory space, PCI IO space, DMA address. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
41 lines
1 KiB
C
41 lines
1 KiB
C
/*
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* Copyright (C) 2009 Lemote, Inc.
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* Author: Wu Zhangjin <wuzj@lemote.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __ASM_MACH_LOONGSON_MEM_H
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#define __ASM_MACH_LOONGSON_MEM_H
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/*
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* high memory space
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*
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* in loongson2e, starts from 512M
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* in loongson2f, starts from 2G 256M
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*/
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#ifdef CONFIG_CPU_LOONGSON2E
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#define LOONGSON_HIGHMEM_START 0x20000000
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#else
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#define LOONGSON_HIGHMEM_START 0x90000000
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#endif
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/*
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* the peripheral registers(MMIO):
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*
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* On the Lemote Loongson 2e system, reside between 0x1000:0000 and 0x2000:0000.
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* On the Lemote Loongson 2f system, reside between 0x1000:0000 and 0x8000:0000.
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*/
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#define LOONGSON_MMIO_MEM_START 0x10000000
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#ifdef CONFIG_CPU_LOONGSON2E
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#define LOONGSON_MMIO_MEM_END 0x20000000
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#else
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#define LOONGSON_MMIO_MEM_END 0x80000000
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#endif
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#endif /* __ASM_MACH_LOONGSON_MEM_H */
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