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author | Yinghai Lu <yinghai@kernel.org> | 2010-02-10 01:20:07 -0800 |
---|---|---|
committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-10 17:47:17 -0800 |
commit | 27811d8cabe56e0c3622251b049086f49face4ff (patch) | |
tree | d3966301efca0886fa2b53d74d1f9e5f1cf55056 /arch/x86/pci | |
parent | c85e4aae699360e8db4ebfe710e917ac9b6fc77e (diff) | |
download | linux-27811d8cabe56e0c3622251b049086f49face4ff.tar.gz linux-27811d8cabe56e0c3622251b049086f49face4ff.tar.bz2 linux-27811d8cabe56e0c3622251b049086f49face4ff.zip |
x86: Move range related operation to one file
We have almost the same code for mtrr cleanup and amd_bus checkup, and
this code will also be used in replacing bootmem with early_res,
so try to move them together and reuse it from different parts.
Also rename update_range to subtract_range as that is what the
function is actually doing.
-v2: update comments as Christoph requested
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1265793639-15071-4-git-send-email-yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/pci')
-rw-r--r-- | arch/x86/pci/amd_bus.c | 70 |
1 files changed, 11 insertions, 59 deletions
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c index 95ecbd495955..2356ea18697d 100644 --- a/arch/x86/pci/amd_bus.c +++ b/arch/x86/pci/amd_bus.c @@ -2,6 +2,8 @@ #include <linux/pci.h> #include <linux/topology.h> #include <linux/cpu.h> +#include <linux/range.h> + #include <asm/pci_x86.h> #ifdef CONFIG_X86_64 @@ -17,58 +19,6 @@ #ifdef CONFIG_X86_64 -#define RANGE_NUM 16 - -struct res_range { - size_t start; - size_t end; -}; - -static void __init update_range(struct res_range *range, size_t start, - size_t end) -{ - int i; - int j; - - for (j = 0; j < RANGE_NUM; j++) { - if (!range[j].end) - continue; - - if (start <= range[j].start && end >= range[j].end) { - range[j].start = 0; - range[j].end = 0; - continue; - } - - if (start <= range[j].start && end < range[j].end && range[j].start < end + 1) { - range[j].start = end + 1; - continue; - } - - - if (start > range[j].start && end >= range[j].end && range[j].end > start - 1) { - range[j].end = start - 1; - continue; - } - - if (start > range[j].start && end < range[j].end) { - /* find the new spare */ - for (i = 0; i < RANGE_NUM; i++) { - if (range[i].end == 0) - break; - } - if (i < RANGE_NUM) { - range[i].end = range[j].end; - range[i].start = end + 1; - } else { - printk(KERN_ERR "run of slot in ranges\n"); - } - range[j].end = start - 1; - continue; - } - } -} - struct pci_hostbridge_probe { u32 bus; u32 slot; @@ -111,6 +61,8 @@ static void __init get_pci_mmcfg_amd_fam10h_range(void) fam10h_mmconf_end = base + (1ULL<<(segn_busn_bits + 20)) - 1; } +#define RANGE_NUM 16 + /** * early_fill_mp_bus_to_node() * called before pcibios_scan_root and pci_scan_bus @@ -132,7 +84,7 @@ static int __init early_fill_mp_bus_info(void) struct resource *res; size_t start; size_t end; - struct res_range range[RANGE_NUM]; + struct range range[RANGE_NUM]; u64 val; u32 address; @@ -226,7 +178,7 @@ static int __init early_fill_mp_bus_info(void) if (end > 0xffff) end = 0xffff; update_res(info, start, end, IORESOURCE_IO, 1); - update_range(range, start, end); + subtract_range(range, RANGE_NUM, start, end); } /* add left over io port range to def node/link, [0, 0xffff] */ /* find the position */ @@ -256,14 +208,14 @@ static int __init early_fill_mp_bus_info(void) end = (val & 0xffffff800000ULL); printk(KERN_INFO "TOM: %016lx aka %ldM\n", end, end>>20); if (end < (1ULL<<32)) - update_range(range, 0, end - 1); + subtract_range(range, RANGE_NUM, 0, end - 1); /* get mmconfig */ get_pci_mmcfg_amd_fam10h_range(); /* need to take out mmconf range */ if (fam10h_mmconf_end) { printk(KERN_DEBUG "Fam 10h mmconf [%llx, %llx]\n", fam10h_mmconf_start, fam10h_mmconf_end); - update_range(range, fam10h_mmconf_start, fam10h_mmconf_end); + subtract_range(range, RANGE_NUM, fam10h_mmconf_start, fam10h_mmconf_end); } /* mmio resource */ @@ -318,7 +270,7 @@ static int __init early_fill_mp_bus_info(void) /* we got a hole */ endx = fam10h_mmconf_start - 1; update_res(info, start, endx, IORESOURCE_MEM, 0); - update_range(range, start, endx); + subtract_range(range, RANGE_NUM, start, endx); printk(KERN_CONT " ==> [%llx, %llx]", (u64)start, endx); start = fam10h_mmconf_end + 1; changed = 1; @@ -334,7 +286,7 @@ static int __init early_fill_mp_bus_info(void) } update_res(info, start, end, IORESOURCE_MEM, 1); - update_range(range, start, end); + subtract_range(range, RANGE_NUM, start, end); printk(KERN_CONT "\n"); } @@ -349,7 +301,7 @@ static int __init early_fill_mp_bus_info(void) rdmsrl(address, val); end = (val & 0xffffff800000ULL); printk(KERN_INFO "TOM2: %016lx aka %ldM\n", end, end>>20); - update_range(range, 1ULL<<32, end - 1); + subtract_range(range, RANGE_NUM, 1ULL<<32, end - 1); } /* |