forked from Minki/linux
157 lines
3.6 KiB
C
157 lines
3.6 KiB
C
/*
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* arch/arm/mach-mv78xx0/addr-map.c
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*
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* Address map functions for Marvell MV78xx0 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 "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 4
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#define TARGET_PCIE1 8
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#define TARGET_PCIE(i) ((i) ? TARGET_PCIE1 : TARGET_PCIE0)
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#define ATTR_DEV_SPI_ROM 0x1f
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#define ATTR_DEV_BOOT 0x2f
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#define ATTR_DEV_CS3 0x37
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#define ATTR_DEV_CS2 0x3b
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#define ATTR_DEV_CS1 0x3d
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#define ATTR_DEV_CS0 0x3e
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#define ATTR_PCIE_IO(l) (0xf0 & ~(0x10 << (l)))
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#define ATTR_PCIE_MEM(l) (0xf8 & ~(0x10 << (l)))
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/*
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* Helpers to get DDR bank info
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*/
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#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3))
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#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3))
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/*
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* CPU Address Decode Windows registers
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*/
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#define WIN0_OFF(n) (BRIDGE_VIRT_BASE + 0x0000 + ((n) << 4))
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#define WIN8_OFF(n) (BRIDGE_VIRT_BASE + 0x0900 + (((n) - 8) << 4))
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#define WIN_CTRL_OFF 0x0000
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#define WIN_BASE_OFF 0x0004
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#define WIN_REMAP_LO_OFF 0x0008
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#define WIN_REMAP_HI_OFF 0x000c
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struct mbus_dram_target_info mv78xx0_mbus_dram_info;
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static void __init __iomem *win_cfg_base(int win)
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{
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/*
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* Find the control register base address for this window.
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*
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* BRIDGE_VIRT_BASE points to the right (CPU0's or CPU1's)
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* MBUS bridge depending on which CPU core we're running on,
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* so we don't need to take that into account here.
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*/
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return (void __iomem *)((win < 8) ? WIN0_OFF(win) : WIN8_OFF(win));
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}
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static int __init cpu_win_can_remap(int win)
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{
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if (win < 8)
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return 1;
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return 0;
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}
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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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void __iomem *addr = win_cfg_base(win);
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u32 ctrl;
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base &= 0xffff0000;
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ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1;
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writel(base, addr + WIN_BASE_OFF);
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writel(ctrl, addr + WIN_CTRL_OFF);
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if (cpu_win_can_remap(win)) {
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if (remap < 0)
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remap = base;
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writel(remap & 0xffff0000, addr + WIN_REMAP_LO_OFF);
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writel(0, addr + WIN_REMAP_HI_OFF);
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}
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}
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void __init mv78xx0_setup_cpu_mbus(void)
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{
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void __iomem *addr;
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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 < 14; i++) {
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addr = win_cfg_base(i);
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writel(0, addr + WIN_BASE_OFF);
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writel(0, addr + WIN_CTRL_OFF);
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if (cpu_win_can_remap(i)) {
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writel(0, addr + WIN_REMAP_LO_OFF);
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writel(0, addr + WIN_REMAP_HI_OFF);
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}
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}
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/*
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* Setup MBUS dram target info.
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*/
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mv78xx0_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
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if (mv78xx0_core_index() == 0)
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addr = (void __iomem *)DDR_WINDOW_CPU0_BASE;
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else
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addr = (void __iomem *)DDR_WINDOW_CPU1_BASE;
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for (i = 0, cs = 0; i < 4; i++) {
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u32 base = readl(addr + DDR_BASE_CS_OFF(i));
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u32 size = readl(addr + DDR_SIZE_CS_OFF(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 = &mv78xx0_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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mv78xx0_mbus_dram_info.num_cs = cs;
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}
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void __init mv78xx0_setup_pcie_io_win(int window, u32 base, u32 size,
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int maj, int min)
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{
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setup_cpu_win(window, base, size, TARGET_PCIE(maj),
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ATTR_PCIE_IO(min), -1);
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}
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void __init mv78xx0_setup_pcie_mem_win(int window, u32 base, u32 size,
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int maj, int min)
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{
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setup_cpu_win(window, base, size, TARGET_PCIE(maj),
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ATTR_PCIE_MEM(min), -1);
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}
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