/* * arch/arm/mach-orion/addr-map.c * * Address map functions for Marvell Orion System On Chip * * Maintainer: Tzachi Perelstein * * 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 #include #include #include #include "common.h" /* * The Orion has fully programable address map. There's a separate address * map for each of the device _master_ interfaces, e.g. CPU, PCI, PCIE, USB, * Gigabit Ethernet, DMA/XOR engines, etc. Each interface has its own * address decode windows that allow it to access any of the Orion resources. * * CPU address decoding -- * Linux assumes that it is the boot loader that already setup the access to * DDR and internal registers. * Setup access to PCI and PCI-E IO/MEM space is issued by this file. * Setup access to various devices located on the device bus interface (e.g. * flashes, RTC, etc) should be issued by machine-setup.c according to * specific board population (by using orion_setup_*_win()). * * Non-CPU Masters address decoding -- * Unlike the CPU, we setup the access from Orion's master interfaces to DDR * banks only (the typical use case). * Setup access for each master to DDR is issued by common.c. * * Note: although orion_setbits() and orion_clrbits() are not atomic * no locking is necessary here since code in this file is only called * at boot time when there is no concurrency issues. */ /* * Generic Address Decode Windows bit settings */ #define TARGET_DDR 0 #define TARGET_PCI 3 #define TARGET_PCIE 4 #define TARGET_DEV_BUS 1 #define ATTR_DDR_CS(n) (((n) ==0) ? 0xe : \ ((n) == 1) ? 0xd : \ ((n) == 2) ? 0xb : \ ((n) == 3) ? 0x7 : 0xf) #define ATTR_PCIE_MEM 0x59 #define ATTR_PCIE_IO 0x51 #define ATTR_PCIE_WA 0x79 #define ATTR_PCI_MEM 0x59 #define ATTR_PCI_IO 0x51 #define ATTR_DEV_CS0 0x1e #define ATTR_DEV_CS1 0x1d #define ATTR_DEV_CS2 0x1b #define ATTR_DEV_BOOT 0xf #define WIN_EN 1 /* * Helpers to get DDR banks info */ #define DDR_BASE_CS(n) ORION_DDR_REG(0x1500 + ((n) * 8)) #define DDR_SIZE_CS(n) ORION_DDR_REG(0x1504 + ((n) * 8)) #define DDR_MAX_CS 4 #define DDR_REG_TO_SIZE(reg) (((reg) | 0xffffff) + 1) #define DDR_REG_TO_BASE(reg) ((reg) & 0xff000000) #define DDR_BANK_EN 1 /* * CPU Address Decode Windows registers */ #define CPU_WIN_CTRL(n) ORION_BRIDGE_REG(0x000 | ((n) << 4)) #define CPU_WIN_BASE(n) ORION_BRIDGE_REG(0x004 | ((n) << 4)) #define CPU_WIN_REMAP_LO(n) ORION_BRIDGE_REG(0x008 | ((n) << 4)) #define CPU_WIN_REMAP_HI(n) ORION_BRIDGE_REG(0x00c | ((n) << 4)) /* * Gigabit Ethernet Address Decode Windows registers */ #define ETH_WIN_BASE(win) ORION_ETH_REG(0x200 + ((win) * 8)) #define ETH_WIN_SIZE(win) ORION_ETH_REG(0x204 + ((win) * 8)) #define ETH_WIN_REMAP(win) ORION_ETH_REG(0x280 + ((win) * 4)) #define ETH_WIN_EN ORION_ETH_REG(0x290) #define ETH_WIN_PROT ORION_ETH_REG(0x294) #define ETH_MAX_WIN 6 #define ETH_MAX_REMAP_WIN 4 struct mbus_dram_target_info orion_mbus_dram_info; static int __init orion_cpu_win_can_remap(int win) { u32 dev, rev; orion_pcie_id(&dev, &rev); if ((dev == MV88F5281_DEV_ID && win < 4) || (dev == MV88F5182_DEV_ID && win < 2) || (dev == MV88F5181_DEV_ID && win < 2)) return 1; return 0; } static void __init setup_cpu_win(int win, u32 base, u32 size, u8 target, u8 attr, int remap) { orion_write(CPU_WIN_BASE(win), base & 0xffff0000); orion_write(CPU_WIN_CTRL(win), ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1); if (orion_cpu_win_can_remap(win)) { if (remap < 0) remap = base; orion_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000); orion_write(CPU_WIN_REMAP_HI(win), 0); } } void __init orion_setup_cpu_mbus_bridge(void) { int i; int cs; /* * First, disable and clear windows. */ for (i = 0; i < 8; i++) { orion_write(CPU_WIN_BASE(i), 0); orion_write(CPU_WIN_CTRL(i), 0); if (orion_cpu_win_can_remap(i)) { orion_write(CPU_WIN_REMAP_LO(i), 0); orion_write(CPU_WIN_REMAP_HI(i), 0); } } /* * Setup windows for PCI+PCIe IO+MEM space. */ setup_cpu_win(0, ORION_PCIE_IO_PHYS_BASE, ORION_PCIE_IO_SIZE, TARGET_PCIE, ATTR_PCIE_IO, ORION_PCIE_IO_BUS_BASE); setup_cpu_win(1, ORION_PCI_IO_PHYS_BASE, ORION_PCI_IO_SIZE, TARGET_PCI, ATTR_PCI_IO, ORION_PCI_IO_BUS_BASE); setup_cpu_win(2, ORION_PCIE_MEM_PHYS_BASE, ORION_PCIE_MEM_SIZE, TARGET_PCIE, ATTR_PCIE_MEM, -1); setup_cpu_win(3, ORION_PCI_MEM_PHYS_BASE, ORION_PCI_MEM_SIZE, TARGET_PCI, ATTR_PCI_MEM, -1); /* * Setup MBUS dram target info. */ orion_mbus_dram_info.mbus_dram_target_id = TARGET_DDR; for (i = 0, cs = 0; i < 4; i++) { u32 base = readl(DDR_BASE_CS(i)); u32 size = readl(DDR_SIZE_CS(i)); /* * Chip select enabled? */ if (size & 1) { struct mbus_dram_window *w; w = &orion_mbus_dram_info.cs[cs++]; w->cs_index = i; w->mbus_attr = 0xf & ~(1 << i); w->base = base & 0xff000000; w->size = (size | 0x00ffffff) + 1; } } orion_mbus_dram_info.num_cs = cs; } void __init orion_setup_dev_boot_win(u32 base, u32 size) { setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1); } void __init orion_setup_dev0_win(u32 base, u32 size) { setup_cpu_win(5, base, size, TARGET_DEV_BUS, ATTR_DEV_CS0, -1); } void __init orion_setup_dev1_win(u32 base, u32 size) { setup_cpu_win(6, base, size, TARGET_DEV_BUS, ATTR_DEV_CS1, -1); } void __init orion_setup_dev2_win(u32 base, u32 size) { setup_cpu_win(7, base, size, TARGET_DEV_BUS, ATTR_DEV_CS2, -1); } void __init orion_setup_pcie_wa_win(u32 base, u32 size) { setup_cpu_win(7, base, size, TARGET_PCIE, ATTR_PCIE_WA, -1); } void __init orion_setup_eth_wins(void) { int i; /* * First, disable and clear windows */ for (i = 0; i < ETH_MAX_WIN; i++) { orion_write(ETH_WIN_BASE(i), 0); orion_write(ETH_WIN_SIZE(i), 0); orion_setbits(ETH_WIN_EN, 1 << i); orion_clrbits(ETH_WIN_PROT, 0x3 << (i * 2)); if (i < ETH_MAX_REMAP_WIN) orion_write(ETH_WIN_REMAP(i), 0); } /* * Setup windows for DDR banks. */ for (i = 0; i < DDR_MAX_CS; i++) { u32 base, size; size = orion_read(DDR_SIZE_CS(i)); base = orion_read(DDR_BASE_CS(i)); if (size & DDR_BANK_EN) { base = DDR_REG_TO_BASE(base); size = DDR_REG_TO_SIZE(size); orion_write(ETH_WIN_SIZE(i), (size-1) & 0xffff0000); orion_write(ETH_WIN_BASE(i), (base & 0xffff0000) | (ATTR_DDR_CS(i) << 8) | TARGET_DDR); orion_clrbits(ETH_WIN_EN, 1 << i); orion_setbits(ETH_WIN_PROT, 0x3 << (i * 2)); } } }