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cpu/x86/lapic: Drop xapic_write_atomic()

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Remove code, which was only needed for B and C2 stepping
of P54C. The linux kernel source has commentary on X86_BUG_11AP:

 * See if we have a good local APIC by checking for buggy Pentia,
 * i.e. all B steppings and the C2 stepping of P54C when using their
 * integrated APIC (see 11AP erratum in "Pentium Processor
 * Specification Update")

Change-Id: Iec10335f603674bcef2e7494831cf11200795d38
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55199
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Kyösti Mälkki 2021-05-31 14:41:15 +03:00
commit b31b033ccc
2 changed files with 4 additions and 15 deletions
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2
src/cpu/x86/lapic/lapic_cpu_init.c
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@ -128,7 +128,7 @@ static int lapic_start_cpu(unsigned long apicid)
printk(BIOS_ERR, "ESR is 0x%x\n", lapic_read(LAPIC_ESR));
if (lapic_read(LAPIC_ESR)) {
printk(BIOS_ERR, "Try to reset ESR\n");
xapic_write_atomic(LAPIC_ESR, 0);
lapic_write(LAPIC_ESR, 0);
printk(BIOS_ERR, "ESR is 0x%x\n",
lapic_read(LAPIC_ESR));
}