+++ /dev/null
-/*
- * Motorola MCG Harrier northbridge/memory controller support
- *
- * Author: Dale Farnsworth
- * dale.farnsworth@mvista.com
- *
- * 2001 (c) MontaVista, Software, Inc. 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/pci.h>
-#include <linux/harrier_defs.h>
-
-#include <asm/byteorder.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/pci.h>
-#include <asm/pci-bridge.h>
-#include <asm/open_pic.h>
-#include <asm/harrier.h>
-
-/* define defaults for inbound windows */
-#define HARRIER_ITAT_DEFAULT (HARRIER_ITAT_ENA | \
- HARRIER_ITAT_MEM | \
- HARRIER_ITAT_WPE | \
- HARRIER_ITAT_GBL)
-
-#define HARRIER_MPAT_DEFAULT (HARRIER_ITAT_ENA | \
- HARRIER_ITAT_MEM | \
- HARRIER_ITAT_WPE | \
- HARRIER_ITAT_GBL)
-
-/*
- * Initialize the inbound window size on a non-monarch harrier.
- */
-void __init harrier_setup_nonmonarch(uint ppc_reg_base, uint in0_size)
-{
- u16 temps;
- u32 temp;
-
- if (in0_size > HARRIER_ITSZ_2GB) {
- printk
- ("harrier_setup_nonmonarch: Invalid window size code %d\n",
- in0_size);
- return;
- }
-
- /* Clear the PCI memory enable bit. If we don't, then when the
- * inbound windows are enabled below, the corresponding BARs will be
- * "live" and start answering to PCI memory reads from their default
- * addresses (0x0), which overlap with system RAM.
- */
- temps = in_le16((u16 *) (ppc_reg_base +
- HARRIER_XCSR_CONFIG(PCI_COMMAND)));
- temps &= ~(PCI_COMMAND_MEMORY);
- out_le16((u16 *) (ppc_reg_base + HARRIER_XCSR_CONFIG(PCI_COMMAND)),
- temps);
-
- /* Setup a non-prefetchable inbound window */
- out_le32((u32 *) (ppc_reg_base +
- HARRIER_XCSR_CONFIG(HARRIER_ITSZ0_OFF)), in0_size);
-
- temp = in_le32((u32 *) (ppc_reg_base +
- HARRIER_XCSR_CONFIG(HARRIER_ITAT0_OFF)));
- temp &= ~HARRIER_ITAT_PRE;
- temp |= HARRIER_ITAT_DEFAULT;
- out_le32((u32 *) (ppc_reg_base +
- HARRIER_XCSR_CONFIG(HARRIER_ITAT0_OFF)), temp);
-
- /* Enable the message passing block */
- temp = in_le32((u32 *) (ppc_reg_base +
- HARRIER_XCSR_CONFIG(HARRIER_MPAT_OFF)));
- temp |= HARRIER_MPAT_DEFAULT;
- out_le32((u32 *) (ppc_reg_base +
- HARRIER_XCSR_CONFIG(HARRIER_MPAT_OFF)), temp);
-}
-
-void __init harrier_release_eready(uint ppc_reg_base)
-{
- ulong temp;
-
- /*
- * Set EREADY to allow the line to be pulled up after everyone is
- * ready.
- */
- temp = in_be32((uint *) (ppc_reg_base + HARRIER_MISC_CSR_OFF));
- temp |= HARRIER_EREADY;
- out_be32((uint *) (ppc_reg_base + HARRIER_MISC_CSR_OFF), temp);
-}
-
-void __init harrier_wait_eready(uint ppc_reg_base)
-{
- ulong temp;
-
- /*
- * Poll the ERDYS line until it goes high to indicate that all
- * non-monarch PrPMCs are ready for bus enumeration (or that there are
- * no PrPMCs present).
- */
-
- /* FIXME: Add a timeout of some kind to prevent endless waits. */
- do {
-
- temp = in_be32((uint *) (ppc_reg_base + HARRIER_MISC_CSR_OFF));
-
- } while (!(temp & HARRIER_ERDYS));
-}
-
-/*
- * Initialize the Motorola MCG Harrier host bridge.
- *
- * This means setting up the PPC bus to PCI memory and I/O space mappings,
- * setting the PCI memory space address of the MPIC (mapped straight
- * through), and ioremap'ing the mpic registers.
- * 'OpenPIC_Addr' will be set correctly by this routine.
- * This routine will not change the PCI_CONFIG_ADDR or PCI_CONFIG_DATA
- * addresses and assumes that the mapping of PCI memory space back to system
- * memory is set up correctly by PPCBug.
- */
-int __init
-harrier_init(struct pci_controller *hose,
- uint ppc_reg_base,
- ulong processor_pci_mem_start,
- ulong processor_pci_mem_end,
- ulong processor_pci_io_start,
- ulong processor_pci_io_end, ulong processor_mpic_base)
-{
- uint addr, offset;
-
- /*
- * Some sanity checks...
- */
- if (((processor_pci_mem_start & 0xffff0000) != processor_pci_mem_start)
- || ((processor_pci_io_start & 0xffff0000) !=
- processor_pci_io_start)) {
- printk("harrier_init: %s\n",
- "PPC to PCI mappings must start on 64 KB boundaries");
- return -1;
- }
-
- if (((processor_pci_mem_end & 0x0000ffff) != 0x0000ffff) ||
- ((processor_pci_io_end & 0x0000ffff) != 0x0000ffff)) {
- printk("harrier_init: PPC to PCI mappings %s\n",
- "must end just before a 64 KB boundaries");
- return -1;
- }
-
- if (((processor_pci_mem_end - processor_pci_mem_start) !=
- (hose->mem_space.end - hose->mem_space.start)) ||
- ((processor_pci_io_end - processor_pci_io_start) !=
- (hose->io_space.end - hose->io_space.start))) {
- printk("harrier_init: %s\n",
- "PPC and PCI memory or I/O space sizes don't match");
- return -1;
- }
-
- if ((processor_mpic_base & 0xfffc0000) != processor_mpic_base) {
- printk("harrier_init: %s\n",
- "MPIC address must start on 256 KB boundary");
- return -1;
- }
-
- if ((pci_dram_offset & 0xffff0000) != pci_dram_offset) {
- printk("harrier_init: %s\n",
- "pci_dram_offset must be multiple of 64 KB");
- return -1;
- }
-
- /*
- * Program the OTAD/OTOF registers to set up the PCI Mem & I/O
- * space mappings. These are the mappings going from the processor to
- * the PCI bus.
- *
- * Note: Don't need to 'AND' start/end addresses with 0xffff0000
- * because sanity check above ensures that they are properly
- * aligned.
- */
-
- /* Set up PPC->PCI Mem mapping */
- addr = processor_pci_mem_start | (processor_pci_mem_end >> 16);
-#ifdef CONFIG_HARRIER_STORE_GATHERING
- offset = (hose->mem_space.start - processor_pci_mem_start) | 0x9a;
-#else
- offset = (hose->mem_space.start - processor_pci_mem_start) | 0x92;
-#endif
- out_be32((uint *) (ppc_reg_base + HARRIER_OTAD0_OFF), addr);
- out_be32((uint *) (ppc_reg_base + HARRIER_OTOF0_OFF), offset);
-
- /* Set up PPC->PCI I/O mapping -- Contiguous I/O space */
- addr = processor_pci_io_start | (processor_pci_io_end >> 16);
- offset = (hose->io_space.start - processor_pci_io_start) | 0x80;
- out_be32((uint *) (ppc_reg_base + HARRIER_OTAD1_OFF), addr);
- out_be32((uint *) (ppc_reg_base + HARRIER_OTOF1_OFF), offset);
-
- /* Enable MPIC */
- OpenPIC_Addr = (void *)processor_mpic_base;
- addr = (processor_mpic_base >> 16) | 1;
- out_be16((ushort *) (ppc_reg_base + HARRIER_MBAR_OFF), addr);
- out_8((u_char *) (ppc_reg_base + HARRIER_MPIC_CSR_OFF),
- HARRIER_MPIC_OPI_ENABLE);
-
- return 0;
-}
-
-/*
- * Find the amount of RAM present.
- * This assumes that PPCBug has initialized the memory controller (SMC)
- * on the Harrier correctly (i.e., it does no sanity checking).
- * It also assumes that the memory base registers are set to configure the
- * memory as contiguous starting with "RAM A BASE", "RAM B BASE", etc.
- * however, RAM base registers can be skipped (e.g. A, B, C are set,
- * D is skipped but E is set is okay).
- */
-#define MB (1024*1024UL)
-
-static uint harrier_size_table[] __initdata = {
- 0 * MB, /* 0 ==> 0 MB */
- 32 * MB, /* 1 ==> 32 MB */
- 64 * MB, /* 2 ==> 64 MB */
- 64 * MB, /* 3 ==> 64 MB */
- 128 * MB, /* 4 ==> 128 MB */
- 128 * MB, /* 5 ==> 128 MB */
- 128 * MB, /* 6 ==> 128 MB */
- 256 * MB, /* 7 ==> 256 MB */
- 256 * MB, /* 8 ==> 256 MB */
- 256 * MB, /* 9 ==> 256 MB */
- 512 * MB, /* a ==> 512 MB */
- 512 * MB, /* b ==> 512 MB */
- 512 * MB, /* c ==> 512 MB */
- 1024 * MB, /* d ==> 1024 MB */
- 1024 * MB, /* e ==> 1024 MB */
- 2048 * MB, /* f ==> 2048 MB */
-};
-
-/*
- * *** WARNING: You MUST have a BAT set up to map in the XCSR regs ***
- *
- * Read the memory controller's registers to determine the amount of system
- * memory. Assumes that the memory controller registers are already mapped
- * into virtual memory--too early to use ioremap().
- */
-unsigned long __init harrier_get_mem_size(uint xcsr_base)
-{
- ulong last_addr;
- int i;
- uint vend_dev_id;
- uint *size_table;
- uint val;
- uint *csrp;
- uint size;
- int size_table_entries;
-
- vend_dev_id = in_be32((uint *) xcsr_base + PCI_VENDOR_ID);
-
- if (((vend_dev_id & 0xffff0000) >> 16) != PCI_VENDOR_ID_MOTOROLA) {
- printk("harrier_get_mem_size: %s (0x%x)\n",
- "Not a Motorola Memory Controller", vend_dev_id);
- return 0;
- }
-
- vend_dev_id &= 0x0000ffff;
-
- if (vend_dev_id == PCI_DEVICE_ID_MOTOROLA_HARRIER) {
- size_table = harrier_size_table;
- size_table_entries = sizeof(harrier_size_table) /
- sizeof(harrier_size_table[0]);
- } else {
- printk("harrier_get_mem_size: %s (0x%x)\n",
- "Not a Harrier", vend_dev_id);
- return 0;
- }
-
- last_addr = 0;
-
- csrp = (uint *) (xcsr_base + HARRIER_SDBA_OFF);
- for (i = 0; i < 8; i++) {
- val = in_be32(csrp++);
-
- if (val & 0x100) { /* If enabled */
- size = val >> HARRIER_SDB_SIZE_SHIFT;
- size &= HARRIER_SDB_SIZE_MASK;
- if (size >= size_table_entries) {
- break; /* Register not set correctly */
- }
- size = size_table[size];
-
- val &= ~(size - 1);
- val += size;
-
- if (val > last_addr) {
- last_addr = val;
- }
- }
- }
-
- return last_addr;
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff