123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
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/*
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* arch/arm/mach-loki/addr-map.c
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*
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* Address map functions for Marvell Loki (88RC8480) SoCs
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/mbus.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include "common.h"
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/*
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* Generic Address Decode Windows bit settings
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*/
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#define TARGET_DDR 0
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#define TARGET_DEV_BUS 1
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#define TARGET_PCIE0 3
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#define TARGET_PCIE1 4
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#define ATTR_DEV_BOOT 0x0f
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#define ATTR_DEV_CS2 0x1b
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#define ATTR_DEV_CS1 0x1d
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#define ATTR_DEV_CS0 0x1e
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#define ATTR_PCIE_IO 0x51
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#define ATTR_PCIE_MEM 0x59
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/*
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* Helpers to get DDR bank info
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*/
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#define DDR_SIZE_CS(n) DDR_REG(0x1500 + ((n) << 3))
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#define DDR_BASE_CS(n) DDR_REG(0x1504 + ((n) << 3))
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/*
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* CPU Address Decode Windows registers
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*/
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#define BRIDGE_REG(x) (BRIDGE_VIRT_BASE | (x))
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#define CPU_WIN_CTRL(n) BRIDGE_REG(0x000 | ((n) << 4))
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#define CPU_WIN_BASE(n) BRIDGE_REG(0x004 | ((n) << 4))
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#define CPU_WIN_REMAP_LO(n) BRIDGE_REG(0x008 | ((n) << 4))
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#define CPU_WIN_REMAP_HI(n) BRIDGE_REG(0x00c | ((n) << 4))
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struct mbus_dram_target_info loki_mbus_dram_info;
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static void __init setup_cpu_win(int win, u32 base, u32 size,
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u8 target, u8 attr, int remap)
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{
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u32 ctrl;
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base &= 0xffff0000;
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ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (1 << 5) | target;
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writel(base, CPU_WIN_BASE(win));
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writel(ctrl, CPU_WIN_CTRL(win));
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if (win < 2) {
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if (remap < 0)
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remap = base;
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writel(remap & 0xffff0000, CPU_WIN_REMAP_LO(win));
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writel(0, CPU_WIN_REMAP_HI(win));
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}
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}
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void __init loki_setup_cpu_mbus(void)
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{
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int i;
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int cs;
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/*
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* First, disable and clear windows.
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*/
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for (i = 0; i < 8; i++) {
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writel(0, CPU_WIN_BASE(i));
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writel(0, CPU_WIN_CTRL(i));
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if (i < 2) {
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writel(0, CPU_WIN_REMAP_LO(i));
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writel(0, CPU_WIN_REMAP_HI(i));
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}
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}
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/*
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* Setup windows for PCIe IO+MEM space.
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*/
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setup_cpu_win(2, LOKI_PCIE0_MEM_PHYS_BASE, LOKI_PCIE0_MEM_SIZE,
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TARGET_PCIE0, ATTR_PCIE_MEM, -1);
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setup_cpu_win(3, LOKI_PCIE1_MEM_PHYS_BASE, LOKI_PCIE1_MEM_SIZE,
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TARGET_PCIE1, ATTR_PCIE_MEM, -1);
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/*
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* Setup MBUS dram target info.
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*/
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loki_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
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for (i = 0, cs = 0; i < 4; i++) {
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u32 base = readl(DDR_BASE_CS(i));
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u32 size = readl(DDR_SIZE_CS(i));
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/*
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* Chip select enabled?
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*/
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if (size & 1) {
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struct mbus_dram_window *w;
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w = &loki_mbus_dram_info.cs[cs++];
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w->cs_index = i;
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w->mbus_attr = 0xf & ~(1 << i);
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w->base = base & 0xffff0000;
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w->size = (size | 0x0000ffff) + 1;
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}
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}
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loki_mbus_dram_info.num_cs = cs;
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}
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void __init loki_setup_dev_boot_win(u32 base, u32 size)
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{
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setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
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}
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