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authorKyösti Mälkki <kyosti.malkki@gmail.com>2017-04-13 15:25:43 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2017-07-17 19:31:09 +0000
commitbebd766f165e7b3e1f6776c52067ab8998422607 (patch)
tree65a5c5e921a79af38b93154a85c274171056c402 /src/mainboard/amd/bettong
parent9de82612fe722cf3526ed508a463bfb6c9f911d0 (diff)
downloadcoreboot-bebd766f165e7b3e1f6776c52067ab8998422607.tar.xz
binaryPI: Disable CAR with empty stack
Calling disable_cache_as_ram() with valuables in stack is not a stable solution, as per documentation AMD_DISABLE_STACK should destroy stack in cache. While we still preserve cache contents (there is wbinvd deep inside AMD_DISABLE_STACK macro), we now actually do a stack switch and much more closely meet the specification of CAR teardown sequence in AGESA specifications. We now somewhat incorrectly include files from agesa/ tree, but the whole agesawrapper.c file removal will address the issue of overall directory layout. Change-Id: I2bac098099c1caffea181356c63924f4b5a93b54 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/18525 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/mainboard/amd/bettong')
-rw-r--r--src/mainboard/amd/bettong/romstage.c15
1 files changed, 5 insertions, 10 deletions
diff --git a/src/mainboard/amd/bettong/romstage.c b/src/mainboard/amd/bettong/romstage.c
index 29cd8a7284..eefae85337 100644
--- a/src/mainboard/amd/bettong/romstage.c
+++ b/src/mainboard/amd/bettong/romstage.c
@@ -20,6 +20,7 @@
#include <cpu/x86/lapic.h>
#include <cpu/x86/bist.h>
#include <cpu/amd/car.h>
+#include <northbridge/amd/agesa/state_machine.h>
#include <northbridge/amd/pi/agesawrapper.h>
#include <northbridge/amd/pi/agesawrapper_call.h>
#include <southbridge/amd/pi/hudson/hudson.h>
@@ -28,9 +29,6 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
{
u32 val;
- /* Must come first to enable PCI MMCONF. */
- amd_initmmio();
-
hudson_lpc_port80();
if (!cpu_init_detectedx && boot_cpu()) {
@@ -62,18 +60,15 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
post_code(0x40);
AGESAWRAPPER(amdinitpost);
+}
+
+void agesa_postcar(struct sysinfo *cb)
+{
post_code(0x41);
AGESAWRAPPER(amdinitenv);
- /* TODO: Disable cache is not ok. */
- disable_cache_as_ram();
if (acpi_is_wakeup_s4()) {
outb(0xEE, PM_INDEX);
outb(0x8, PM_DATA);
}
-
- post_code(0x50);
- copy_and_run();
-
- post_code(0x54); /* Should never see this post code. */
}