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x86: quark: Turn on legacy segments decode

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By default the legacy segments (A0000h-B0000h, E0000h-F0000h)
do not decode to system RAM. Turn on the decode so that we can
write configuration tables in the F segment.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-04-27 14:16:02 +08:00 committed by Simon Glass
parent 283a08e52a
commit f82a7840f1
2 changed files with 19 additions and 0 deletions
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12
arch/x86/cpu/quark/quark.c
View File

@ -72,6 +72,15 @@ static void quark_setup_bars(void)
CONFIG_PCIE_ECAM_BASE | MEM_BAR_EN);
}
static void quark_enable_legacy_seg(void)
{
u32 hmisc2;
hmisc2 = msg_port_read(MSG_PORT_HOST_BRIDGE, HMISC2);
hmisc2 |= (HMISC2_SEGE | HMISC2_SEGF | HMISC2_SEGAB);
msg_port_write(MSG_PORT_HOST_BRIDGE, HMISC2, hmisc2);
}
int arch_cpu_init(void)
{
struct pci_controller *hose;
@ -96,6 +105,9 @@ int arch_cpu_init(void)
*/
quark_setup_bars();
/* Turn on legacy segments (A/B/E/F) decode to system RAM */
quark_enable_legacy_seg();
unprotect_spi_flash();
return 0;

7
arch/x86/include/asm/arch-quark/quark.h
View File

@ -21,6 +21,13 @@
/* Port 0x03: Host Bridge Message Port Registers */
/* Host Miscellaneous Controls 2 */
#define HMISC2 0x03
#define HMISC2_SEGE 0x00000002
#define HMISC2_SEGF 0x00000004
#define HMISC2_SEGAB 0x00000010
/* Host Memory I/O Boundary */
#define HM_BOUND 0x08