diff options
Diffstat (limited to 'drivers/video/uvesafb.c')
| -rw-r--r-- | drivers/video/uvesafb.c | 70 |
1 files changed, 17 insertions, 53 deletions
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c index 10138b60fd70..b963ea12d175 100644 --- a/drivers/video/uvesafb.c +++ b/drivers/video/uvesafb.c @@ -24,9 +24,6 @@ #ifdef CONFIG_X86 #include <video/vga.h> #endif -#ifdef CONFIG_MTRR -#include <asm/mtrr.h> -#endif #include "edid.h" static struct cb_id uvesafb_cn_id = { @@ -1540,67 +1537,30 @@ static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) static void uvesafb_init_mtrr(struct fb_info *info) { -#ifdef CONFIG_MTRR + struct uvesafb_par *par = info->par; + if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { int temp_size = info->fix.smem_len; - unsigned int type = 0; - switch (mtrr) { - case 1: - type = MTRR_TYPE_UNCACHABLE; - break; - case 2: - type = MTRR_TYPE_WRBACK; - break; - case 3: - type = MTRR_TYPE_WRCOMB; - break; - case 4: - type = MTRR_TYPE_WRTHROUGH; - break; - default: - type = 0; - break; - } + int rc; - if (type) { - int rc; + /* Find the largest power-of-two */ + temp_size = roundup_pow_of_two(temp_size); - /* Find the largest power-of-two */ - temp_size = roundup_pow_of_two(temp_size); + /* Try and find a power of two to add */ + do { + rc = arch_phys_wc_add(info->fix.smem_start, temp_size); + temp_size >>= 1; + } while (temp_size >= PAGE_SIZE && rc == -EINVAL); - /* Try and find a power of two to add */ - do { - rc = mtrr_add(info->fix.smem_start, - temp_size, type, 1); - temp_size >>= 1; - } while (temp_size >= PAGE_SIZE && rc == -EINVAL); - } + if (rc >= 0) + par->mtrr_handle = rc; } -#endif /* CONFIG_MTRR */ } static void uvesafb_ioremap(struct fb_info *info) { -#ifdef CONFIG_X86 - switch (mtrr) { - case 1: /* uncachable */ - info->screen_base = ioremap_nocache(info->fix.smem_start, info->fix.smem_len); - break; - case 2: /* write-back */ - info->screen_base = ioremap_cache(info->fix.smem_start, info->fix.smem_len); - break; - case 3: /* write-combining */ - info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); - break; - case 4: /* write-through */ - default: - info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); - break; - } -#else - info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); -#endif /* CONFIG_X86 */ + info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); } static ssize_t uvesafb_show_vbe_ver(struct device *dev, @@ -1851,6 +1811,7 @@ static int uvesafb_remove(struct platform_device *dev) unregister_framebuffer(info); release_region(0x3c0, 32); iounmap(info->screen_base); + arch_phys_wc_del(par->mtrr_handle); release_mem_region(info->fix.smem_start, info->fix.smem_len); fb_destroy_modedb(info->monspecs.modedb); fb_dealloc_cmap(&info->cmap); @@ -1930,6 +1891,9 @@ static int uvesafb_setup(char *options) } } + if (mtrr != 3 && mtrr != 1) + pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr); + return 0; } #endif /* !MODULE */ |