core_titan.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:13k
- /*
- * linux/arch/alpha/kernel/core_titan.c
- *
- * Code common to all TITAN core logic chips.
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/pci.h>
- #include <linux/sched.h>
- #include <linux/init.h>
- #include <asm/ptrace.h>
- #include <asm/system.h>
- #include <asm/smp.h>
- #define __EXTERN_INLINE inline
- #include <asm/io.h>
- #include <asm/core_titan.h>
- #undef __EXTERN_INLINE
- #include <linux/bootmem.h>
- #include "proto.h"
- #include "pci_impl.h"
- unsigned TITAN_agp = 0;
- static struct
- {
- unsigned long wsba[4];
- unsigned long wsm[4];
- unsigned long tba[4];
- } saved_pachip_port[4];
- /*
- * BIOS32-style PCI interface:
- */
- #define DEBUG_MCHECK 0 /* 0 = minimum, 1 = debug, 2 = dump+dump */
- #define DEBUG_CONFIG 0
- #if DEBUG_CONFIG
- # define DBG_CFG(args) printk args
- #else
- # define DBG_CFG(args)
- #endif
- /*
- * Given a bus, device, and function number, compute resulting
- * configuration space address
- * accordingly. It is therefore not safe to have concurrent
- * invocations to configuration space access routines, but there
- * really shouldn't be any need for this.
- *
- * Note that all config space accesses use Type 1 address format.
- *
- * Note also that type 1 is determined by non-zero bus number.
- *
- * Type 1:
- *
- * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
- * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- *
- * 31:24 reserved
- * 23:16 bus number (8 bits = 128 possible buses)
- * 15:11 Device number (5 bits)
- * 10:8 function number
- * 7:2 register number
- *
- * Notes:
- * The function number selects which function of a multi-function device
- * (e.g., SCSI and Ethernet).
- *
- * The register selects a DWORD (32 bit) register offset. Hence it
- * doesn't get shifted by 2 bits as we want to "drop" the bottom two
- * bits.
- */
- static int
- mk_conf_addr(struct pci_dev *dev, int where, unsigned long *pci_addr,
- unsigned char *type1)
- {
- struct pci_controller *hose = dev->sysdata;
- unsigned long addr;
- u8 bus = dev->bus->number;
- u8 device_fn = dev->devfn;
- DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
- "pci_addr=0x%p, type1=0x%p)n",
- bus, device_fn, where, pci_addr, type1));
- if (hose->first_busno == dev->bus->number)
- bus = 0;
- *type1 = (bus != 0);
- addr = (bus << 16) | (device_fn << 8) | where;
- addr |= hose->config_space_base;
-
- *pci_addr = addr;
- DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lxn", addr));
- return 0;
- }
- static int
- titan_read_config_byte(struct pci_dev *dev, int where, u8 *value)
- {
- unsigned long addr;
- unsigned char type1;
- if (mk_conf_addr(dev, where, &addr, &type1))
- return PCIBIOS_DEVICE_NOT_FOUND;
- *value = __kernel_ldbu(*(vucp)addr);
- return PCIBIOS_SUCCESSFUL;
- }
- static int
- titan_read_config_word(struct pci_dev *dev, int where, u16 *value)
- {
- unsigned long addr;
- unsigned char type1;
- if (mk_conf_addr(dev, where, &addr, &type1))
- return PCIBIOS_DEVICE_NOT_FOUND;
- *value = __kernel_ldwu(*(vusp)addr);
- return PCIBIOS_SUCCESSFUL;
- }
- static int
- titan_read_config_dword(struct pci_dev *dev, int where, u32 *value)
- {
- unsigned long addr;
- unsigned char type1;
- if (mk_conf_addr(dev, where, &addr, &type1))
- return PCIBIOS_DEVICE_NOT_FOUND;
- *value = *(vuip)addr;
- return PCIBIOS_SUCCESSFUL;
- }
- static int
- titan_write_config_byte(struct pci_dev *dev, int where, u8 value)
- {
- unsigned long addr;
- unsigned char type1;
- if (mk_conf_addr(dev, where, &addr, &type1))
- return PCIBIOS_DEVICE_NOT_FOUND;
- __kernel_stb(value, *(vucp)addr);
- mb();
- __kernel_ldbu(*(vucp)addr);
- return PCIBIOS_SUCCESSFUL;
- }
- static int
- titan_write_config_word(struct pci_dev *dev, int where, u16 value)
- {
- unsigned long addr;
- unsigned char type1;
- if (mk_conf_addr(dev, where, &addr, &type1))
- return PCIBIOS_DEVICE_NOT_FOUND;
- __kernel_stw(value, *(vusp)addr);
- mb();
- __kernel_ldwu(*(vusp)addr);
- return PCIBIOS_SUCCESSFUL;
- }
- static int
- titan_write_config_dword(struct pci_dev *dev, int where, u32 value)
- {
- unsigned long addr;
- unsigned char type1;
- if (mk_conf_addr(dev, where, &addr, &type1))
- return PCIBIOS_DEVICE_NOT_FOUND;
- *(vuip)addr = value;
- mb();
- *(vuip)addr;
- return PCIBIOS_SUCCESSFUL;
- }
- struct pci_ops titan_pci_ops =
- {
- read_byte: titan_read_config_byte,
- read_word: titan_read_config_word,
- read_dword: titan_read_config_dword,
- write_byte: titan_write_config_byte,
- write_word: titan_write_config_word,
- write_dword: titan_write_config_dword
- };
- void
- titan_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
- {
- titan_pachip *pachip =
- (hose->index & 1) ? TITAN_pachip1 : TITAN_pachip0;
- titan_pachip_port *port;
- volatile unsigned long *csr;
- unsigned long value;
- /* Get the right hose */
- port = &pachip->g_port;
- if (hose->index & 2)
- port = &pachip->a_port;
- /* We can invalidate up to 8 tlb entries in a go. The flush
- matches against <31:16> in the pci address. */
- csr = &port->port_specific.g.gtlbia.csr;
- if (((start ^ end) & 0xffff0000) == 0)
- csr = &port->port_specific.g.gtlbiv.csr;
- /* For TBIA, it doesn't matter what value we write. For TBI,
- it's the shifted tag bits. */
- value = (start & 0xffff0000) >> 12;
- wmb();
- *csr = value;
- mb();
- *csr;
- }
- #define FN __FUNCTION__
- static int __init
- titan_query_agp(titan_pachip_port *port)
- {
- union TPAchipPCTL pctl;
- /* set up APCTL */
- pctl.pctl_q_whole = port->pctl.csr;
- return pctl.pctl_r_bits.apctl_v_agp_present;
- }
- static void __init
- titan_init_agp(titan_pachip_port *port, struct pci_controller *hose)
- {
- union TPAchipPCTL pctl;
- if (!titan_query_agp(port))
- return;
- printk("AGP present on hose %dn", hose->index);
- /* get APCTL */
- pctl.pctl_q_whole = port->pctl.csr;
- pctl.pctl_r_bits.apctl_v_agp_en = 1; /* enable AGP */
- pctl.pctl_r_bits.apctl_v_agp_lp_rd = 0;
- pctl.pctl_r_bits.apctl_v_agp_hp_rd = 0;
- port->pctl.csr = pctl.pctl_q_whole;
- TITAN_agp |= 1 << hose->index;
- #ifdef CONFIG_VGA_HOSE
- /* is a graphics card on the AGP? (always device 5) */
- if (hose != NULL &&
- __kernel_ldwu(*(vusp)(hose->config_space_base + 0x280a)) ==
- PCI_CLASS_DISPLAY_VGA)
- set_vga_hose(hose);
- #endif
- }
- static void __init
- titan_init_one_pachip_port(titan_pachip_port *port, int index)
- {
- struct pci_controller *hose;
- unsigned long sg_size;
- hose = alloc_pci_controller();
- if (index == 0)
- pci_isa_hose = hose;
- hose->io_space = alloc_resource();
- hose->mem_space = alloc_resource();
- /* This is for userland consumption. For some reason, the 40-bit
- PIO bias that we use in the kernel through KSEG didn't work for
- the page table based user mappings. So make sure we get the
- 43-bit PIO bias. */
- hose->sparse_mem_base = 0;
- hose->sparse_io_base = 0;
- hose->dense_mem_base
- = (TITAN_MEM(index) & 0xffffffffff) | 0x80000000000;
- hose->dense_io_base
- = (TITAN_IO(index) & 0xffffffffff) | 0x80000000000;
- hose->config_space_base = TITAN_CONF(index);
- hose->index = index;
- hose->io_space->start = TITAN_IO(index) - TITAN_IO_BIAS;
- hose->io_space->end = hose->io_space->start + TITAN_IO_SPACE - 1;
- hose->io_space->name = pci_io_names[index];
- hose->io_space->flags = IORESOURCE_IO;
- hose->mem_space->start = TITAN_MEM(index) - TITAN_MEM_BIAS;
- hose->mem_space->end = hose->mem_space->start + 0xffffffff;
- hose->mem_space->name = pci_mem_names[index];
- hose->mem_space->flags = IORESOURCE_MEM;
- if (request_resource(&ioport_resource, hose->io_space) < 0)
- printk(KERN_ERR "Failed to request IO on hose %dn", index);
- if (request_resource(&iomem_resource, hose->mem_space) < 0)
- printk(KERN_ERR "Failed to request MEM on hose %dn", index);
- /* It's safe to call this for both G-Ports and A-Ports */
- titan_init_agp(port, hose);
- /*
- * Save the existing PCI window translations. SRM will
- * need them when we go to reboot.
- */
- saved_pachip_port[index].wsba[0] = port->wsba[0].csr;
- saved_pachip_port[index].wsm[0] = port->wsm[0].csr;
- saved_pachip_port[index].tba[0] = port->tba[0].csr;
- saved_pachip_port[index].wsba[1] = port->wsba[1].csr;
- saved_pachip_port[index].wsm[1] = port->wsm[1].csr;
- saved_pachip_port[index].tba[1] = port->tba[1].csr;
- saved_pachip_port[index].wsba[2] = port->wsba[2].csr;
- saved_pachip_port[index].wsm[2] = port->wsm[2].csr;
- saved_pachip_port[index].tba[2] = port->tba[2].csr;
- saved_pachip_port[index].wsba[3] = port->wsba[3].csr;
- saved_pachip_port[index].wsm[3] = port->wsm[3].csr;
- saved_pachip_port[index].tba[3] = port->tba[3].csr;
- /*
- * Set up the PCI to main memory translation windows.
- *
- * Note: Window 3 on Titan is Scatter-Gather ONLY
- *
- * Window 0 is scatter-gather 8MB at 8MB (for isa)
- * Window 1 is scatter-gather (up to) 1GB at 1GB
- * Window 2 is direct access 2GB at 2GB
- */
- hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 0);
- hose->sg_isa->align_entry = 8; /* 64KB for ISA */
- hose->sg_pci = iommu_arena_new(hose, 0x40000000,
- size_for_memory(0x40000000), 0);
- hose->sg_pci->align_entry = 4; /* Titan caches 4 PTEs at a time */
- __direct_map_base = 0x80000000;
- __direct_map_size = 0x80000000;
- port->wsba[0].csr = hose->sg_isa->dma_base | 3;
- port->wsm[0].csr = (hose->sg_isa->size - 1) & 0xfff00000;
- port->tba[0].csr = virt_to_phys(hose->sg_isa->ptes);
- port->wsba[1].csr = hose->sg_pci->dma_base | 3;
- port->wsm[1].csr = (hose->sg_pci->size - 1) & 0xfff00000;
- port->tba[1].csr = virt_to_phys(hose->sg_pci->ptes);
- port->wsba[2].csr = 0x80000000 | 1;
- port->wsm[2].csr = (0x80000000 - 1) & 0xfff00000;
- port->tba[2].csr = 0;
- port->wsba[3].csr = 0;
- /* Enable the Monster Window to make DAC pci64 possible. */
- port->pctl.csr |= pctl_m_mwin;
- titan_pci_tbi(hose, 0, -1);
- }
- static void __init
- titan_init_pachips(titan_pachip *pachip0, titan_pachip *pachip1)
- {
- int pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
- /* Init the ports in hose order... */
- titan_init_one_pachip_port(&pachip0->g_port, 0); /* hose 0 */
- if (pchip1_present)
- titan_init_one_pachip_port(&pachip1->g_port, 1);/* hose 1 */
- titan_init_one_pachip_port(&pachip0->a_port, 2); /* hose 2 */
- if (pchip1_present)
- titan_init_one_pachip_port(&pachip1->a_port, 3);/* hose 3 */
- }
- void __init
- titan_init_arch(void)
- {
- #if 0
- printk("%s: titan_init_arch()n", FN);
- printk("%s: CChip registers:n", FN);
- printk("%s: CSR_CSC 0x%lxn", FN, TITAN_cchip->csc.csr);
- printk("%s: CSR_MTR 0x%lxn", FN, TITAN_cchip->mtr.csr);
- printk("%s: CSR_MISC 0x%lxn", FN, TITAN_cchip->misc.csr);
- printk("%s: CSR_DIM0 0x%lxn", FN, TITAN_cchip->dim0.csr);
- printk("%s: CSR_DIM1 0x%lxn", FN, TITAN_cchip->dim1.csr);
- printk("%s: CSR_DIR0 0x%lxn", FN, TITAN_cchip->dir0.csr);
- printk("%s: CSR_DIR1 0x%lxn", FN, TITAN_cchip->dir1.csr);
- printk("%s: CSR_DRIR 0x%lxn", FN, TITAN_cchip->drir.csr);
- printk("%s: DChip registers:n", FN);
- printk("%s: CSR_DSC 0x%lxn", FN, TITAN_dchip->dsc.csr);
- printk("%s: CSR_STR 0x%lxn", FN, TITAN_dchip->str.csr);
- printk("%s: CSR_DREV 0x%lxn", FN, TITAN_dchip->drev.csr);
- #endif
- boot_cpuid = __hard_smp_processor_id();
- /* With multiple PCI busses, we play with I/O as physical addrs. */
- ioport_resource.end = ~0UL;
- iomem_resource.end = ~0UL;
- /* Init the PA chip(s) */
- titan_init_pachips(TITAN_pachip0, TITAN_pachip1);
- }
- static void
- titan_kill_one_pachip_port(titan_pachip_port *port, int index)
- {
- port->wsba[0].csr = saved_pachip_port[index].wsba[0];
- port->wsm[0].csr = saved_pachip_port[index].wsm[0];
- port->tba[0].csr = saved_pachip_port[index].tba[0];
- port->wsba[1].csr = saved_pachip_port[index].wsba[1];
- port->wsm[1].csr = saved_pachip_port[index].wsm[1];
- port->tba[1].csr = saved_pachip_port[index].tba[1];
- port->wsba[2].csr = saved_pachip_port[index].wsba[2];
- port->wsm[2].csr = saved_pachip_port[index].wsm[2];
- port->tba[2].csr = saved_pachip_port[index].tba[2];
- port->wsba[3].csr = saved_pachip_port[index].wsba[3];
- port->wsm[3].csr = saved_pachip_port[index].wsm[3];
- port->tba[3].csr = saved_pachip_port[index].tba[3];
- }
- static void
- titan_kill_pachips(titan_pachip *pachip0, titan_pachip *pachip1)
- {
- int pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
- if (pchip1_present) {
- titan_kill_one_pachip_port(&pachip0->g_port, 1);
- titan_kill_one_pachip_port(&pachip0->a_port, 3);
- }
- titan_kill_one_pachip_port(&pachip0->g_port, 0);
- titan_kill_one_pachip_port(&pachip0->a_port, 2);
- }
- void
- titan_kill_arch(int mode)
- {
- titan_kill_pachips(TITAN_pachip0, TITAN_pachip1);
- }
- static inline void
- titan_pci_clr_err_1(titan_pachip *pachip)
- {
- unsigned int jd;
- jd = pachip->g_port.port_specific.g.gperror.csr;
- pachip->g_port.port_specific.g.gperror.csr = jd;
- mb();
- pachip->g_port.port_specific.g.gperror.csr;
- }
- static inline void
- titan_pci_clr_err(void)
- {
- titan_pci_clr_err_1(TITAN_pachip0);
- if (TITAN_cchip->csc.csr & 1L<<14)
- titan_pci_clr_err_1(TITAN_pachip1);
- }
- void
- titan_machine_check(unsigned long vector, unsigned long la_ptr,
- struct pt_regs * regs)
- {
- /* clear error before any reporting. */
- mb();
- draina();
- titan_pci_clr_err();
- wrmces(0x7);
- mb();
- process_mcheck_info(vector, la_ptr, regs, "TITAN",
- mcheck_expected(smp_processor_id()));
- }