nb/intel/pineview: Extract HPET setup and delay function

To allow other platforms to reuse this code, extract it into a separate
compilation unit. Since HPET is enabled through the southbridge, place
the code in the southbridge scope. Finally, select the newly-added
Kconfig option from i82801gx and replace lpc.c `enable_hpet` function.

Change-Id: I7a28cc4d12c6d79cd8ec45dfc8100f15e6eac303
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49365
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 1 insertions, 35 deletions

diff --git a/src/northbridge/intel/pineview/raminit.c b/src/northbridge/intel/pineview/raminit.c
index 2248d03c89..dd728e8a47 100644
--- a/src/northbridge/intel/pineview/raminit.c
+++ b/src/northbridge/intel/pineview/raminit.c
@@ -8,6 +8,7 @@
 #include <console/console.h>
 #include <delay.h>
 #include <lib.h>
+#include <southbridge/intel/common/hpet.h>
 #include "pineview.h"
 #include "raminit.h"
 #include <spd.h>
@@ -529,20 +530,6 @@ static void sdram_detect_ram_speed(struct sysinfo *s)
 	}
 }
 
-#define HPET_BASE 0xfed00000
-#define HPET32(x) *((volatile u32 *)(HPET_BASE + x))
-static void enable_hpet(void)
-{
-	u32 reg32;
-	reg32 = RCBA32(HPTC);
-	reg32 &= ~0x03;
-	reg32 |= (1 << 7);
-	RCBA32(HPTC) = reg32;
-	/* On NM10 this only works if read back */
-	RCBA32(HPTC);
-	HPET32(0x10) = HPET32(0x10) | 1;
-}
-
 static void sdram_clk_crossing(struct sysinfo *s)
 {
 	u8 ddr_freq, fsb_freq;
@@ -1595,27 +1582,6 @@ static void sdram_mmap(struct sysinfo *s)
 	pci_write_config32(HOST_BRIDGE, 0xac, tsegmb[s->dimm_config[0]]);
 }
 
-static void hpet_udelay(u32 del)
-{
-	u32 start, finish, now;
-
-	del *= 15; /* now in usec */
-
-	start = HPET32(0xf0);
-	finish = start + del;
-	while (1) {
-		now = HPET32(0xf0);
-		if (finish > start) {
-			if (now >= finish)
-				break;
-		} else {
-			if ((now < start) && (now >= finish)) {
-				break;
-			}
-		}
-	}
-}
-
 static u8 sdram_checkrcompoverride(void)
 {
 	u32 xcomp;