mirror of https://gitee.com/openkylin/linux.git
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/*
|
|
* Address map functions for Marvell 370 / XP SoCs
|
|
*
|
|
* Copyright (C) 2012 Marvell
|
|
*
|
|
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mbus.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <plat/addr-map.h>
|
|
|
|
/*
|
|
* Generic Address Decode Windows bit settings
|
|
*/
|
|
#define ARMADA_XP_TARGET_DEV_BUS 1
|
|
#define ARMADA_XP_ATTR_DEV_BOOTROM 0x1D
|
|
#define ARMADA_XP_TARGET_ETH1 3
|
|
#define ARMADA_XP_TARGET_PCIE_0_2 4
|
|
#define ARMADA_XP_TARGET_ETH0 7
|
|
#define ARMADA_XP_TARGET_PCIE_1_3 8
|
|
|
|
#define ARMADA_370_TARGET_DEV_BUS 1
|
|
#define ARMADA_370_ATTR_DEV_BOOTROM 0x1D
|
|
#define ARMADA_370_TARGET_PCIE_0 4
|
|
#define ARMADA_370_TARGET_PCIE_1 8
|
|
|
|
#define ARMADA_WINDOW_8_PLUS_OFFSET 0x90
|
|
#define ARMADA_SDRAM_ADDR_DECODING_OFFSET 0x180
|
|
|
|
static const struct __initdata orion_addr_map_info
|
|
armada_xp_addr_map_info[] = {
|
|
/*
|
|
* Window for the BootROM, needed for SMP on Armada XP
|
|
*/
|
|
{ 0, 0xfff00000, SZ_1M, ARMADA_XP_TARGET_DEV_BUS,
|
|
ARMADA_XP_ATTR_DEV_BOOTROM, -1 },
|
|
/* End marker */
|
|
{ -1, 0, 0, 0, 0, 0 },
|
|
};
|
|
|
|
static const struct __initdata orion_addr_map_info
|
|
armada_370_addr_map_info[] = {
|
|
/* End marker */
|
|
{ -1, 0, 0, 0, 0, 0 },
|
|
};
|
|
|
|
static struct of_device_id of_addr_decoding_controller_table[] = {
|
|
{ .compatible = "marvell,armada-addr-decoding-controller" },
|
|
{ /* end of list */ },
|
|
};
|
|
|
|
static void __iomem *
|
|
armada_cfg_base(const struct orion_addr_map_cfg *cfg, int win)
|
|
{
|
|
unsigned int offset;
|
|
|
|
/* The register layout is a bit annoying and the below code
|
|
* tries to cope with it.
|
|
* - At offset 0x0, there are the registers for the first 8
|
|
* windows, with 4 registers of 32 bits per window (ctrl,
|
|
* base, remap low, remap high)
|
|
* - Then at offset 0x80, there is a hole of 0x10 bytes for
|
|
* the internal registers base address and internal units
|
|
* sync barrier register.
|
|
* - Then at offset 0x90, there the registers for 12
|
|
* windows, with only 2 registers of 32 bits per window
|
|
* (ctrl, base).
|
|
*/
|
|
if (win < 8)
|
|
offset = (win << 4);
|
|
else
|
|
offset = ARMADA_WINDOW_8_PLUS_OFFSET + ((win - 8) << 3);
|
|
|
|
return cfg->bridge_virt_base + offset;
|
|
}
|
|
|
|
static struct __initdata orion_addr_map_cfg addr_map_cfg = {
|
|
.num_wins = 20,
|
|
.remappable_wins = 8,
|
|
.win_cfg_base = armada_cfg_base,
|
|
};
|
|
|
|
static int __init armada_setup_cpu_mbus(void)
|
|
{
|
|
struct device_node *np;
|
|
void __iomem *mbus_unit_addr_decoding_base;
|
|
void __iomem *sdram_addr_decoding_base;
|
|
|
|
np = of_find_matching_node(NULL, of_addr_decoding_controller_table);
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
mbus_unit_addr_decoding_base = of_iomap(np, 0);
|
|
BUG_ON(!mbus_unit_addr_decoding_base);
|
|
|
|
sdram_addr_decoding_base =
|
|
mbus_unit_addr_decoding_base +
|
|
ARMADA_SDRAM_ADDR_DECODING_OFFSET;
|
|
|
|
addr_map_cfg.bridge_virt_base = mbus_unit_addr_decoding_base;
|
|
|
|
if (of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"))
|
|
addr_map_cfg.hw_io_coherency = 1;
|
|
|
|
/*
|
|
* Disable, clear and configure windows.
|
|
*/
|
|
if (of_machine_is_compatible("marvell,armadaxp"))
|
|
orion_config_wins(&addr_map_cfg, armada_xp_addr_map_info);
|
|
else if (of_machine_is_compatible("marvell,armada370"))
|
|
orion_config_wins(&addr_map_cfg, armada_370_addr_map_info);
|
|
else {
|
|
pr_err("Unsupported SoC\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Setup MBUS dram target info.
|
|
*/
|
|
orion_setup_cpu_mbus_target(&addr_map_cfg,
|
|
sdram_addr_decoding_base);
|
|
return 0;
|
|
}
|
|
|
|
/* Using a early_initcall is needed so that this initialization gets
|
|
* done before the SMP initialization, which requires the BootROM to
|
|
* be remapped. */
|
|
early_initcall(armada_setup_cpu_mbus);
|