mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-23 18:07:03 +00:00
514b6d0c06
The check used to determine if uncached accelerated should be used or not is wrong. The parenthesis are misplaced and making the test fail. Signed-off-by: Arnaud Patard <apatard@mandriva.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/1161/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
#include <loongson.h>
|
|
#include <mem.h>
|
|
#include <pci.h>
|
|
|
|
void __init prom_init_memory(void)
|
|
{
|
|
add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
|
|
|
|
add_memory_region(memsize << 20, LOONGSON_PCI_MEM_START - (memsize <<
|
|
20), BOOT_MEM_RESERVED);
|
|
|
|
#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
|
|
{
|
|
int bit;
|
|
|
|
bit = fls(memsize + highmemsize);
|
|
if (bit != ffs(memsize + highmemsize))
|
|
bit += 20;
|
|
else
|
|
bit = bit + 20 - 1;
|
|
|
|
/* set cpu window3 to map CPU to DDR: 2G -> 2G */
|
|
LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul,
|
|
0x80000000ul, (1 << bit));
|
|
mmiowb();
|
|
}
|
|
#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
|
|
|
|
#ifdef CONFIG_64BIT
|
|
if (highmemsize > 0)
|
|
add_memory_region(LOONGSON_HIGHMEM_START,
|
|
highmemsize << 20, BOOT_MEM_RAM);
|
|
|
|
add_memory_region(LOONGSON_PCI_MEM_END + 1, LOONGSON_HIGHMEM_START -
|
|
LOONGSON_PCI_MEM_END - 1, BOOT_MEM_RESERVED);
|
|
|
|
#endif /* !CONFIG_64BIT */
|
|
}
|
|
|
|
/* override of arch/mips/mm/cache.c: __uncached_access */
|
|
int __uncached_access(struct file *file, unsigned long addr)
|
|
{
|
|
if (file->f_flags & O_DSYNC)
|
|
return 1;
|
|
|
|
return addr >= __pa(high_memory) ||
|
|
((addr >= LOONGSON_MMIO_MEM_START) &&
|
|
(addr < LOONGSON_MMIO_MEM_END));
|
|
}
|
|
|
|
#ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/current.h>
|
|
|
|
static unsigned long uca_start, uca_end;
|
|
|
|
pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
|
|
unsigned long size, pgprot_t vma_prot)
|
|
{
|
|
unsigned long offset = pfn << PAGE_SHIFT;
|
|
unsigned long end = offset + size;
|
|
|
|
if (__uncached_access(file, offset)) {
|
|
if (uca_start && (offset >= uca_start) &&
|
|
(end <= uca_end))
|
|
return __pgprot((pgprot_val(vma_prot) &
|
|
~_CACHE_MASK) |
|
|
_CACHE_UNCACHED_ACCELERATED);
|
|
else
|
|
return pgprot_noncached(vma_prot);
|
|
}
|
|
return vma_prot;
|
|
}
|
|
|
|
static int __init find_vga_mem_init(void)
|
|
{
|
|
struct pci_dev *dev = 0;
|
|
struct resource *r;
|
|
int idx;
|
|
|
|
if (uca_start)
|
|
return 0;
|
|
|
|
for_each_pci_dev(dev) {
|
|
if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
|
|
for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
|
|
r = &dev->resource[idx];
|
|
if (!r->start && r->end)
|
|
continue;
|
|
if (r->flags & IORESOURCE_IO)
|
|
continue;
|
|
if (r->flags & IORESOURCE_MEM) {
|
|
uca_start = r->start;
|
|
uca_end = r->end;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(find_vga_mem_init);
|
|
#endif /* !CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED */
|