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amd64_edac: Sanitize f10_get_base_addr_offset

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This function maps the system address to the normalized DCT address.
Document what the code does for more clarity and wrap insane bitmasks in
a more understandable macro which generates them. Also, reduce number of
arguments passed to the function. Finally, rename this function to what
it actually does.

No functional change.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This commit is contained in:
Borislav Petkov 2010-12-10 19:49:19 +01:00
parent 229a7a11ac
commit c8e518d567
2 changed files with 50 additions and 48 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

83
drivers/edac/amd64_edac.c
View file

@ -460,13 +460,12 @@ int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
}
/* valid for Fam10h and above */
if (boot_cpu_data.x86 >= 0x10 &&
(pvt->dhar & DRAM_MEM_HOIST_VALID) == 0) {
if (boot_cpu_data.x86 >= 0x10 && !dhar_mem_hoist_valid(pvt)) {
debugf1(" Dram Memory Hoisting is DISABLED on this system\n");
return 1;
}
if ((pvt->dhar & DHAR_VALID) == 0) {
if (!dhar_valid(pvt)) {
debugf1(" Dram Memory Hoisting is DISABLED on this node %d\n",
pvt->mc_node_id);
return 1;
@ -859,8 +858,7 @@ static void dump_misc_regs(struct amd64_pvt *pvt)
(boot_cpu_data.x86 == 0xf) ? k8_dhar_offset(pvt)
: f10_dhar_offset(pvt));
debugf1(" DramHoleValid: %s\n",
(pvt->dhar & DHAR_VALID) ? "yes" : "no");
debugf1(" DramHoleValid: %s\n", dhar_valid(pvt) ? "yes" : "no");
amd64_debug_display_dimm_sizes(0, pvt);
@ -1238,30 +1236,53 @@ static u8 f10_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
return 0;
}
/* See F10h BKDG, 2.8.10.2 DctSelBaseOffset Programming */
static inline u64 f10_get_base_addr_offset(u64 sys_addr, bool hi_range_sel,
u32 dct_sel_base_addr,
u64 dct_sel_base_off,
u32 hole_valid, u64 hole_off,
u64 dram_base)
/* Convert the sys_addr to the normalized DCT address */
static u64 f10_get_norm_dct_addr(struct amd64_pvt *pvt, int range,
u64 sys_addr, bool hi_rng,
u32 dct_sel_base_addr)
{
u64 chan_off;
u64 dram_base = get_dram_base(pvt, range);
u64 hole_off = f10_dhar_offset(pvt);
u32 hole_valid = dhar_valid(pvt);
u64 dct_sel_base_off = (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
if (hi_range_sel) {
if (!(dct_sel_base_addr & 0xFFFF0000) &&
hole_valid && (sys_addr >= 0x100000000ULL))
if (hi_rng) {
/*
* if
* base address of high range is below 4Gb
* (bits [47:27] at [31:11])
* DRAM address space on this DCT is hoisted above 4Gb &&
* sys_addr > 4Gb
*
* remove hole offset from sys_addr
* else
* remove high range offset from sys_addr
*/
if ((!(dct_sel_base_addr >> 16) ||
dct_sel_base_addr < dhar_base(pvt)) &&
hole_valid &&
(sys_addr >= BIT_64(32)))
chan_off = hole_off;
else
chan_off = dct_sel_base_off;
} else {
if (hole_valid && (sys_addr >= 0x100000000ULL))
/*
* if
* we have a valid hole &&
* sys_addr > 4Gb
*
* remove hole
* else
* remove dram base to normalize to DCT address
*/
if (hole_valid && (sys_addr >= BIT_64(32)))
chan_off = hole_off;
else
chan_off = dram_base & 0xFFFFF8000000ULL;
chan_off = dram_base;
}
return (sys_addr & 0x0000FFFFFFFFFFC0ULL) -
(chan_off & 0x0000FFFFFF800000ULL);
return (sys_addr & GENMASK(6,47)) - (chan_off & GENMASK(23,47));
}
/* Hack for the time being - Can we get this from BIOS?? */
@ -1346,30 +1367,17 @@ static int f10_match_to_this_node(struct amd64_pvt *pvt, int range,
u64 sys_addr, int *nid, int *chan_sel)
{
int cs_found = -EINVAL;
u64 chan_addr, dct_sel_base_off;
u64 hole_off;
u32 hole_valid, tmp, dct_sel_base;
u64 chan_addr;
u32 tmp, dct_sel_base;
u8 channel;
bool high_range = false;
u8 node_id = dram_dst_node(pvt, range);
u8 intlv_en = dram_intlv_en(pvt, range);
u32 intlv_sel = dram_intlv_sel(pvt, range);
u64 dram_base = get_dram_base(pvt, range);
debugf1("(range %d) Base=0x%llx SystemAddr= 0x%llx Limit=0x%llx\n",
range, dram_base, sys_addr, get_dram_limit(pvt, range));
/*
* This assumes that one node's DHAR is the same as all the other
* nodes' DHAR.
*/
hole_off = f10_dhar_offset(pvt);
hole_valid = (pvt->dhar & DHAR_VALID);
dct_sel_base_off = (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
debugf1(" HoleOffset=0x%016llx HoleValid=%d IntlvSel=0x%x\n",
hole_off, hole_valid, intlv_sel);
debugf1("(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
range, sys_addr, get_dram_limit(pvt, range));
if (intlv_en &&
(intlv_sel != ((sys_addr >> 12) & intlv_en)))
@ -1388,9 +1396,8 @@ static int f10_match_to_this_node(struct amd64_pvt *pvt, int range,
channel = f10_determine_channel(pvt, sys_addr, high_range, intlv_en);
chan_addr = f10_get_base_addr_offset(sys_addr, high_range, dct_sel_base,
dct_sel_base_off, hole_valid,
hole_off, dram_base);
chan_addr = f10_get_norm_dct_addr(pvt, range, sys_addr,
high_range, dct_sel_base);
/* remove Node ID (in case of memory interleaving) */
tmp = chan_addr & 0xFC0;

15
drivers/edac/amd64_edac.h
View file

@ -184,18 +184,13 @@
#define dram_dst_node(pvt, i) (pvt->ranges[i].lim.lo & 0x7)
#define DHAR 0xf0
#define DHAR_VALID BIT(0)
#define DRAM_MEM_HOIST_VALID BIT(1)
#define dhar_valid(pvt) ((pvt)->dhar & BIT(0))
#define dhar_mem_hoist_valid(pvt) ((pvt)->dhar & BIT(1))
#define dhar_base(pvt) ((pvt)->dhar & 0xff000000)
#define k8_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff00) << 16)
#define DHAR_BASE_MASK 0xff000000
#define dhar_base(pvt) ((pvt)->dhar & DHAR_BASE_MASK)
#define K8_DHAR_OFFSET_MASK 0x0000ff00
#define k8_dhar_offset(pvt) (((pvt)->dhar & K8_DHAR_OFFSET_MASK) << 16)
#define F10_DHAR_OFFSET_MASK 0x0000ff80
/* NOTE: Extra mask bit vs K8 */
#define f10_dhar_offset(pvt) (((pvt)->dhar & F10_DHAR_OFFSET_MASK) << 16)
#define f10_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff80) << 16)
#define DCT_CFG_SEL 0x10C