mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Harvey Harrison](/assets/img/avatar_default.png)
__FUNCTION__ is gcc-specific, use __func__ The change in pci-iommu,c should be safe as arena has not been assigned when we get to this point. Some were within #if 0 blocks, have changed them and left the blocks as they appear to be debugging infrastructure. A #define FN __FUNCTION__ was removed and occurances of FN were replaced with __func__ as well. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
480 lines
13 KiB
C
480 lines
13 KiB
C
/*
|
||
* linux/arch/alpha/kernel/core_tsunami.c
|
||
*
|
||
* Based on code written by David A. Rusling (david.rusling@reo.mts.dec.com).
|
||
*
|
||
* Code common to all TSUNAMI core logic chips.
|
||
*/
|
||
|
||
#define __EXTERN_INLINE inline
|
||
#include <asm/io.h>
|
||
#include <asm/core_tsunami.h>
|
||
#undef __EXTERN_INLINE
|
||
|
||
#include <linux/types.h>
|
||
#include <linux/pci.h>
|
||
#include <linux/sched.h>
|
||
#include <linux/init.h>
|
||
#include <linux/bootmem.h>
|
||
|
||
#include <asm/ptrace.h>
|
||
#include <asm/smp.h>
|
||
#include <asm/vga.h>
|
||
|
||
#include "proto.h"
|
||
#include "pci_impl.h"
|
||
|
||
/* Save Tsunami configuration data as the console had it set up. */
|
||
|
||
struct
|
||
{
|
||
unsigned long wsba[4];
|
||
unsigned long wsm[4];
|
||
unsigned long tba[4];
|
||
} saved_config[2] __attribute__((common));
|
||
|
||
/*
|
||
* NOTE: Herein lie back-to-back mb instructions. They are magic.
|
||
* One plausible explanation is that the I/O controller does not properly
|
||
* handle the system transaction. Another involves timing. Ho hum.
|
||
*/
|
||
|
||
/*
|
||
* BIOS32-style PCI interface:
|
||
*/
|
||
|
||
#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_bus *pbus, unsigned int device_fn, int where,
|
||
unsigned long *pci_addr, unsigned char *type1)
|
||
{
|
||
struct pci_controller *hose = pbus->sysdata;
|
||
unsigned long addr;
|
||
u8 bus = pbus->number;
|
||
|
||
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 (!pbus->parent) /* No parent means peer PCI bus. */
|
||
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%lx\n", addr));
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
tsunami_read_config(struct pci_bus *bus, unsigned int devfn, int where,
|
||
int size, u32 *value)
|
||
{
|
||
unsigned long addr;
|
||
unsigned char type1;
|
||
|
||
if (mk_conf_addr(bus, devfn, where, &addr, &type1))
|
||
return PCIBIOS_DEVICE_NOT_FOUND;
|
||
|
||
switch (size) {
|
||
case 1:
|
||
*value = __kernel_ldbu(*(vucp)addr);
|
||
break;
|
||
case 2:
|
||
*value = __kernel_ldwu(*(vusp)addr);
|
||
break;
|
||
case 4:
|
||
*value = *(vuip)addr;
|
||
break;
|
||
}
|
||
|
||
return PCIBIOS_SUCCESSFUL;
|
||
}
|
||
|
||
static int
|
||
tsunami_write_config(struct pci_bus *bus, unsigned int devfn, int where,
|
||
int size, u32 value)
|
||
{
|
||
unsigned long addr;
|
||
unsigned char type1;
|
||
|
||
if (mk_conf_addr(bus, devfn, where, &addr, &type1))
|
||
return PCIBIOS_DEVICE_NOT_FOUND;
|
||
|
||
switch (size) {
|
||
case 1:
|
||
__kernel_stb(value, *(vucp)addr);
|
||
mb();
|
||
__kernel_ldbu(*(vucp)addr);
|
||
break;
|
||
case 2:
|
||
__kernel_stw(value, *(vusp)addr);
|
||
mb();
|
||
__kernel_ldwu(*(vusp)addr);
|
||
break;
|
||
case 4:
|
||
*(vuip)addr = value;
|
||
mb();
|
||
*(vuip)addr;
|
||
break;
|
||
}
|
||
|
||
return PCIBIOS_SUCCESSFUL;
|
||
}
|
||
|
||
struct pci_ops tsunami_pci_ops =
|
||
{
|
||
.read = tsunami_read_config,
|
||
.write = tsunami_write_config,
|
||
};
|
||
|
||
void
|
||
tsunami_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
|
||
{
|
||
tsunami_pchip *pchip = hose->index ? TSUNAMI_pchip1 : TSUNAMI_pchip0;
|
||
volatile unsigned long *csr;
|
||
unsigned long value;
|
||
|
||
/* We can invalidate up to 8 tlb entries in a go. The flush
|
||
matches against <31:16> in the pci address. */
|
||
csr = &pchip->tlbia.csr;
|
||
if (((start ^ end) & 0xffff0000) == 0)
|
||
csr = &pchip->tlbiv.csr;
|
||
|
||
/* For TBIA, it doesn't matter what value we write. For TBI,
|
||
it's the shifted tag bits. */
|
||
value = (start & 0xffff0000) >> 12;
|
||
|
||
*csr = value;
|
||
mb();
|
||
*csr;
|
||
}
|
||
|
||
#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
|
||
static long __init
|
||
tsunami_probe_read(volatile unsigned long *vaddr)
|
||
{
|
||
long dont_care, probe_result;
|
||
int cpu = smp_processor_id();
|
||
int s = swpipl(IPL_MCHECK - 1);
|
||
|
||
mcheck_taken(cpu) = 0;
|
||
mcheck_expected(cpu) = 1;
|
||
mb();
|
||
dont_care = *vaddr;
|
||
draina();
|
||
mcheck_expected(cpu) = 0;
|
||
probe_result = !mcheck_taken(cpu);
|
||
mcheck_taken(cpu) = 0;
|
||
setipl(s);
|
||
|
||
printk("dont_care == 0x%lx\n", dont_care);
|
||
|
||
return probe_result;
|
||
}
|
||
|
||
static long __init
|
||
tsunami_probe_write(volatile unsigned long *vaddr)
|
||
{
|
||
long true_contents, probe_result = 1;
|
||
|
||
TSUNAMI_cchip->misc.csr |= (1L << 28); /* clear NXM... */
|
||
true_contents = *vaddr;
|
||
*vaddr = 0;
|
||
draina();
|
||
if (TSUNAMI_cchip->misc.csr & (1L << 28)) {
|
||
int source = (TSUNAMI_cchip->misc.csr >> 29) & 7;
|
||
TSUNAMI_cchip->misc.csr |= (1L << 28); /* ...and unlock NXS. */
|
||
probe_result = 0;
|
||
printk("tsunami_probe_write: unit %d at 0x%016lx\n", source,
|
||
(unsigned long)vaddr);
|
||
}
|
||
if (probe_result)
|
||
*vaddr = true_contents;
|
||
return probe_result;
|
||
}
|
||
#else
|
||
#define tsunami_probe_read(ADDR) 1
|
||
#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
|
||
|
||
static void __init
|
||
tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
|
||
{
|
||
struct pci_controller *hose;
|
||
|
||
if (tsunami_probe_read(&pchip->pctl.csr) == 0)
|
||
return;
|
||
|
||
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
|
||
= (TSUNAMI_MEM(index) & 0xffffffffffL) | 0x80000000000L;
|
||
hose->dense_io_base
|
||
= (TSUNAMI_IO(index) & 0xffffffffffL) | 0x80000000000L;
|
||
|
||
hose->config_space_base = TSUNAMI_CONF(index);
|
||
hose->index = index;
|
||
|
||
hose->io_space->start = TSUNAMI_IO(index) - TSUNAMI_IO_BIAS;
|
||
hose->io_space->end = hose->io_space->start + TSUNAMI_IO_SPACE - 1;
|
||
hose->io_space->name = pci_io_names[index];
|
||
hose->io_space->flags = IORESOURCE_IO;
|
||
|
||
hose->mem_space->start = TSUNAMI_MEM(index) - TSUNAMI_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 %d\n", index);
|
||
if (request_resource(&iomem_resource, hose->mem_space) < 0)
|
||
printk(KERN_ERR "Failed to request MEM on hose %d\n", index);
|
||
|
||
/*
|
||
* Save the existing PCI window translations. SRM will
|
||
* need them when we go to reboot.
|
||
*/
|
||
|
||
saved_config[index].wsba[0] = pchip->wsba[0].csr;
|
||
saved_config[index].wsm[0] = pchip->wsm[0].csr;
|
||
saved_config[index].tba[0] = pchip->tba[0].csr;
|
||
|
||
saved_config[index].wsba[1] = pchip->wsba[1].csr;
|
||
saved_config[index].wsm[1] = pchip->wsm[1].csr;
|
||
saved_config[index].tba[1] = pchip->tba[1].csr;
|
||
|
||
saved_config[index].wsba[2] = pchip->wsba[2].csr;
|
||
saved_config[index].wsm[2] = pchip->wsm[2].csr;
|
||
saved_config[index].tba[2] = pchip->tba[2].csr;
|
||
|
||
saved_config[index].wsba[3] = pchip->wsba[3].csr;
|
||
saved_config[index].wsm[3] = pchip->wsm[3].csr;
|
||
saved_config[index].tba[3] = pchip->tba[3].csr;
|
||
|
||
/*
|
||
* Set up the PCI to main memory translation windows.
|
||
*
|
||
* Note: Window 3 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
|
||
*
|
||
* NOTE: we need the align_entry settings for Acer devices on ES40,
|
||
* specifically floppy and IDE when memory is larger than 2GB.
|
||
*/
|
||
hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 0);
|
||
/* Initially set for 4 PTEs, but will be overridden to 64K for ISA. */
|
||
hose->sg_isa->align_entry = 4;
|
||
|
||
hose->sg_pci = iommu_arena_new(hose, 0x40000000,
|
||
size_for_memory(0x40000000), 0);
|
||
hose->sg_pci->align_entry = 4; /* Tsunami caches 4 PTEs at a time */
|
||
|
||
__direct_map_base = 0x80000000;
|
||
__direct_map_size = 0x80000000;
|
||
|
||
pchip->wsba[0].csr = hose->sg_isa->dma_base | 3;
|
||
pchip->wsm[0].csr = (hose->sg_isa->size - 1) & 0xfff00000;
|
||
pchip->tba[0].csr = virt_to_phys(hose->sg_isa->ptes);
|
||
|
||
pchip->wsba[1].csr = hose->sg_pci->dma_base | 3;
|
||
pchip->wsm[1].csr = (hose->sg_pci->size - 1) & 0xfff00000;
|
||
pchip->tba[1].csr = virt_to_phys(hose->sg_pci->ptes);
|
||
|
||
pchip->wsba[2].csr = 0x80000000 | 1;
|
||
pchip->wsm[2].csr = (0x80000000 - 1) & 0xfff00000;
|
||
pchip->tba[2].csr = 0;
|
||
|
||
pchip->wsba[3].csr = 0;
|
||
|
||
/* Enable the Monster Window to make DAC pci64 possible. */
|
||
pchip->pctl.csr |= pctl_m_mwin;
|
||
|
||
tsunami_pci_tbi(hose, 0, -1);
|
||
}
|
||
|
||
|
||
void __iomem *
|
||
tsunami_ioportmap(unsigned long addr)
|
||
{
|
||
FIXUP_IOADDR_VGA(addr);
|
||
return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
|
||
}
|
||
|
||
void __iomem *
|
||
tsunami_ioremap(unsigned long addr, unsigned long size)
|
||
{
|
||
FIXUP_MEMADDR_VGA(addr);
|
||
return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
|
||
}
|
||
|
||
#ifndef CONFIG_ALPHA_GENERIC
|
||
EXPORT_SYMBOL(tsunami_ioportmap);
|
||
EXPORT_SYMBOL(tsunami_ioremap);
|
||
#endif
|
||
|
||
void __init
|
||
tsunami_init_arch(void)
|
||
{
|
||
#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
|
||
unsigned long tmp;
|
||
|
||
/* Ho hum.. init_arch is called before init_IRQ, but we need to be
|
||
able to handle machine checks. So install the handler now. */
|
||
wrent(entInt, 0);
|
||
|
||
/* NXMs just don't matter to Tsunami--unless they make it
|
||
choke completely. */
|
||
tmp = (unsigned long)(TSUNAMI_cchip - 1);
|
||
printk("%s: probing bogus address: 0x%016lx\n", __func__, bogus_addr);
|
||
printk("\tprobe %s\n",
|
||
tsunami_probe_write((unsigned long *)bogus_addr)
|
||
? "succeeded" : "failed");
|
||
#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
|
||
|
||
#if 0
|
||
printk("%s: CChip registers:\n", __func__);
|
||
printk("%s: CSR_CSC 0x%lx\n", __func__, TSUNAMI_cchip->csc.csr);
|
||
printk("%s: CSR_MTR 0x%lx\n", __func__, TSUNAMI_cchip.mtr.csr);
|
||
printk("%s: CSR_MISC 0x%lx\n", __func__, TSUNAMI_cchip->misc.csr);
|
||
printk("%s: CSR_DIM0 0x%lx\n", __func__, TSUNAMI_cchip->dim0.csr);
|
||
printk("%s: CSR_DIM1 0x%lx\n", __func__, TSUNAMI_cchip->dim1.csr);
|
||
printk("%s: CSR_DIR0 0x%lx\n", __func__, TSUNAMI_cchip->dir0.csr);
|
||
printk("%s: CSR_DIR1 0x%lx\n", __func__, TSUNAMI_cchip->dir1.csr);
|
||
printk("%s: CSR_DRIR 0x%lx\n", __func__, TSUNAMI_cchip->drir.csr);
|
||
|
||
printk("%s: DChip registers:\n");
|
||
printk("%s: CSR_DSC 0x%lx\n", __func__, TSUNAMI_dchip->dsc.csr);
|
||
printk("%s: CSR_STR 0x%lx\n", __func__, TSUNAMI_dchip->str.csr);
|
||
printk("%s: CSR_DREV 0x%lx\n", __func__, TSUNAMI_dchip->drev.csr);
|
||
#endif
|
||
/* With multiple PCI busses, we play with I/O as physical addrs. */
|
||
ioport_resource.end = ~0UL;
|
||
|
||
/* Find how many hoses we have, and initialize them. TSUNAMI
|
||
and TYPHOON can have 2, but might only have 1 (DS10). */
|
||
|
||
tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
|
||
if (TSUNAMI_cchip->csc.csr & 1L<<14)
|
||
tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
|
||
|
||
/* Check for graphic console location (if any). */
|
||
find_console_vga_hose();
|
||
}
|
||
|
||
static void
|
||
tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
|
||
{
|
||
pchip->wsba[0].csr = saved_config[index].wsba[0];
|
||
pchip->wsm[0].csr = saved_config[index].wsm[0];
|
||
pchip->tba[0].csr = saved_config[index].tba[0];
|
||
|
||
pchip->wsba[1].csr = saved_config[index].wsba[1];
|
||
pchip->wsm[1].csr = saved_config[index].wsm[1];
|
||
pchip->tba[1].csr = saved_config[index].tba[1];
|
||
|
||
pchip->wsba[2].csr = saved_config[index].wsba[2];
|
||
pchip->wsm[2].csr = saved_config[index].wsm[2];
|
||
pchip->tba[2].csr = saved_config[index].tba[2];
|
||
|
||
pchip->wsba[3].csr = saved_config[index].wsba[3];
|
||
pchip->wsm[3].csr = saved_config[index].wsm[3];
|
||
pchip->tba[3].csr = saved_config[index].tba[3];
|
||
}
|
||
|
||
void
|
||
tsunami_kill_arch(int mode)
|
||
{
|
||
tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
|
||
if (TSUNAMI_cchip->csc.csr & 1L<<14)
|
||
tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
|
||
}
|
||
|
||
static inline void
|
||
tsunami_pci_clr_err_1(tsunami_pchip *pchip)
|
||
{
|
||
pchip->perror.csr;
|
||
pchip->perror.csr = 0x040;
|
||
mb();
|
||
pchip->perror.csr;
|
||
}
|
||
|
||
static inline void
|
||
tsunami_pci_clr_err(void)
|
||
{
|
||
tsunami_pci_clr_err_1(TSUNAMI_pchip0);
|
||
|
||
/* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
|
||
if (TSUNAMI_cchip->csc.csr & 1L<<14)
|
||
tsunami_pci_clr_err_1(TSUNAMI_pchip1);
|
||
}
|
||
|
||
void
|
||
tsunami_machine_check(unsigned long vector, unsigned long la_ptr)
|
||
{
|
||
/* Clear error before any reporting. */
|
||
mb();
|
||
mb(); /* magic */
|
||
draina();
|
||
tsunami_pci_clr_err();
|
||
wrmces(0x7);
|
||
mb();
|
||
|
||
process_mcheck_info(vector, la_ptr, "TSUNAMI",
|
||
mcheck_expected(smp_processor_id()));
|
||
}
|