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x86: Sort the MTRR table

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At present the MTRR registers are programmed with the list the U-Boot
builds up in the same order. In some cases this list may be out of order.
It looks better in Linux to have the registers in order, so sort them,

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-09-22 12:45:27 -06:00 committed by Bin Meng
parent aec7c1c565
commit f31b02c84e
1 changed files with 12 additions and 0 deletions
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12
arch/x86/cpu/mtrr.c
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@ -19,6 +19,7 @@
#include <common.h>
#include <cpu_func.h>
#include <log.h>
#include <sort.h>
#include <asm/cache.h>
#include <asm/io.h>
#include <asm/mp.h>
@ -124,6 +125,16 @@ static int mtrr_copy_to_aps(void)
return 0;
}
static int h_comp_mtrr(const void *p1, const void *p2)
{
const struct mtrr_request *req1 = p1;
const struct mtrr_request *req2 = p2;
s64 diff = req1->start - req2->start;
return diff < 0 ? -1 : diff > 0 ? 1 : 0;
}
int mtrr_commit(bool do_caches)
{
struct mtrr_request *req = gd->arch.mtrr_req;
@ -139,6 +150,7 @@ int mtrr_commit(bool do_caches)
debug("open\n");
mtrr_open(&state, do_caches);
debug("open done\n");
qsort(req, gd->arch.mtrr_req_count, sizeof(*req), h_comp_mtrr);
for (i = 0; i < gd->arch.mtrr_req_count; i++, req++)
set_var_mtrr(i, req->type, req->start, req->size);