Improving BKDG implementation of P-states,

CPU and northbridge frequency and voltage
handling for Fam 10 in SVI mode.

I didn't understand quite why it did that iwth F3xA0 (Power
Control Misc Register) so I moved Pll Lock time to rules in defaults.h
and reimplemented F3xA0 programming. A later patch will remove
a part I don't know what's mean to do.

Signed-off-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
Acked-by: Marc Jones <marcj303@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6396 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/cpu/amd/model_10xxx/defaults.h

@@ -68,7 +68,7 @@ static const struct {
 	  1 << 24, 0x00000000,
 	  1 << 24, 0x00000000 },	/* Erratum #261 [DIS_PIGGY_BACK_SCRUB]=1 */
 
-	{ LS_CFG, AMD_FAM10_GT_B0, AMD_PTYPE_ALL,
+	{ LS_CFG, AMD_DR_GT_B0, AMD_PTYPE_ALL,
 	  0 << 1, 0x00000000,
 	  1 << 1, 0x00000000 },		/* IDX_MATCH_ALL=0 */
 
@@ -261,8 +261,11 @@ static const struct {
 	{ 3, 0xA0, AMD_FAM10_ALL, AMD_PTYPE_MOB | AMD_PTYPE_DSK,
 	  0x00000080, 0x00000080 },	/* [7] PSIVidEnable */
 
-	{ 3, 0xA0, AMD_FAM10_ALL, AMD_PTYPE_ALL,
+	{ 3, 0xA0, AMD_DR_Bx, AMD_PTYPE_ALL,
-	  0x00001800, 0x000003800 },	/* [13:11] PllLockTime = 3 */
+	  0x00002800, 0x000003800 },	/* [13:11] PllLockTime = 5 */
+
+	{ 3, 0xA0, (AMD_FAM10_ALL & ~(AMD_DR_Bx)), AMD_PTYPE_ALL,
+	  0x00000800, 0x000003800 },	/* [13:11] PllLockTime = 1 */
 
 	/* Reported Temp Control Register */
 	{ 3, 0xA4, AMD_FAM10_ALL, AMD_PTYPE_ALL,

src/cpu/amd/model_10xxx/fidvid.c

@@ -275,19 +275,18 @@ static void config_clk_power_ctrl_reg0(int node, u32 cpuRev, u8 procPkg) {
 
 }
 
-static void config_power_ctrl_misc_reg(device_t dev) {
+static void config_power_ctrl_misc_reg(device_t dev,u32 cpuRev, u8 procPkg) { 
 	/* check PVI/SVI */
 	u32 dword = pci_read_config32(dev, 0xA0);
+
+        /* BKDG r31116 2010-04-22  2.4.1.7 step b F3xA0[VSSlamVidMod] */
+        /* PllLockTime and PsiVidEn set in ruleset in defaults.h */
 	if (dword & PVI_MODE) {	/* PVI */
 		/* set slamVidMode to 0 for PVI */
-		dword &= VID_SLAM_OFF | PLLLOCK_OFF;
+		dword &= VID_SLAM_OFF ;
-		dword |= PLLLOCK_DFT_L;
-		pci_write_config32(dev, 0xA0, dword);
 	} else {	/* SVI */
 		/* set slamVidMode to 1 for SVI */
-		dword &= PLLLOCK_OFF;
+		dword |= VID_SLAM_ON;
-		dword |= PLLLOCK_DFT_L | VID_SLAM_ON;
-		pci_write_config32(dev, 0xA0, dword);
 
 		u32 dtemp = dword;
 
@@ -299,7 +298,27 @@ static void config_power_ctrl_misc_reg(device_t dev) {
 		else
 			dword &= PWR_PLN_OFF;
 		pci_write_config32(dev, 0xD8, dword);
+
+                dword = dtemp;
+        }
+        /* set the rest of A0 since we're at it... */
+        
+        if (cpuRev & (AMD_DA_Cx | AMD_RB_C3 )) { 
+	     dword |= NB_PSTATE_FORCE_ON;
+	} // else should we clear it ? 
+
+
+        if ((procPkg == AMD_PKGTYPE_G34) || (procPkg == AMD_PKGTYPE_C32) ) {
+	  dword |= BP_INS_TRI_EN_ON ;
 	}
+
+	   /* TODO: look into C1E state and F3xA0[IdleExitEn]*/
+        #if CONFIG_SVI_HIGH_FREQ
+	   if (cpuRev & AMD_FAM10_C3) {
+	     dword |= SVI_HIGH_FREQ_ON;
+           }
+        #endif
+	pci_write_config32(dev, 0xA0, dword);
 }
             
 static void config_nb_syn_ptr_adj(device_t dev) {
@@ -344,8 +363,7 @@ static void prep_fid_change(void)
 
                 config_clk_power_ctrl_reg0(i,cpuRev,procPkg);
 
-                config_power_ctrl_misc_reg(dev);
+                config_power_ctrl_misc_reg(dev,cpuRev,procPkg);                       
-
  		config_nb_syn_ptr_adj(dev);
 
                 config_acpi_pwr_state_ctrl_regs(dev);

src/northbridge/amd/amdfam10/Kconfig

@@ -112,4 +112,12 @@ if DIMM_DDR3
 endif
 endif
 
+config SVI_HIGH_FREQ
+	bool
+	default n
+	depends on NORTHBRIDGE_AMD_AMDFAM10
+        help
+          Select this for boards with a Voltage Regulator able to operate
+          at 3.4 MHz in SVI mode. Ignored unless the AMD CPU is rev C3.
+ 
 source src/northbridge/amd/amdfam10/root_complex/Kconfig

src/northbridge/amd/amdht/AsPsDefs.h

@@ -198,11 +198,19 @@
 #define PVI_MODE 0x100			/* PviMode bit mask */
 #define VID_SLAM_OFF 0x0dfffffff	/* set VidSlamMode OFF */
 #define VID_SLAM_ON 0x020000000	/* set VidSlamMode ON */
+#define NB_PSTATE_FORCE_ON 0x010000000 /* set Northbridge P-state
+					  force on next LDTSTOP
+					  assertion on, in F3xA0 */
+#define BP_INS_TRI_EN_ON 0x00004000   /* breakpoint pins tristate
+					 enable in F3xA0 */
 #define PLLLOCK_OFF 0x0ffffc7ff	/* PllLockTime Mask OFF */
 #define PLLLOCK_DFT 0x00001800		/* PllLockTime default value = 011b */
 #define PLLLOCK_DFT_L 0x00002800	/* PllLockTime long value = 101b */
 
-/* P-state Specification register base in PCI sapce */
+#define SVI_HIGH_FREQ_ON 0x00000200     /* F3xA0[SviHighFreqSel] for
+					   3.4 MHz SVI in rev. C3 */
+
+/* P-state Specification register base in PCI space */
 #define PS_SPEC_REG 0x1e0		/* PS Spec register base address */
 #define PCI_REG_LEN 4			/* PCI register length */
 #define NB_DID_MASK 0x10000		/* NbDid bit mask */

src/northbridge/amd/amdmct/amddefs.h

@@ -64,7 +64,9 @@
 #define	AMD_DR_ALL	(AMD_DR_Bx)
 #define	AMD_FAM10_ALL	(AMD_DR_ALL | AMD_RB_C2 | AMD_HY_D0 | AMD_DA_C3 | AMD_DA_C2 | AMD_RB_C3 )
 #define	AMD_FAM10_GT_B0	(AMD_FAM10_ALL & ~(AMD_DR_B0))
-#define	AMD_DR_Cx       (AMD_RB_C2 | AMD_DA_C2 | AMD_RB_C3 | AMD_DA_C3)
+#define	AMD_DA_Cx       (AMD_DA_C2 | AMD_DA_C3)
+#define	AMD_DR_Cx       (AMD_RB_C2 | AMD_RB_C3 | AMD_DA_Cx)
+#define	AMD_FAM10_C3       (AMD_RB_C3 | AMD_DA_C3)
 #define	AMD_DR_Dx       (AMD_HY_D0)
 #define	AMD_DRBH_Cx       (AMD_DR_Cx | AMD_HY_D0 )
 #define AMD_DRBA23_RBC2 (AMD_DR_BA | AMD_DR_B2 | AMD_DR_B3 | AMD_RB_C2 )