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-rw-r--r--src/cpu/amd/model_lx/cpureginit.c286
-rw-r--r--src/cpu/amd/model_lx/msrinit.c10
2 files changed, 124 insertions, 172 deletions
diff --git a/src/cpu/amd/model_lx/cpureginit.c b/src/cpu/amd/model_lx/cpureginit.c
index 62fa973a8c..6e7de84c6a 100644
--- a/src/cpu/amd/model_lx/cpureginit.c
+++ b/src/cpu/amd/model_lx/cpureginit.c
@@ -1,6 +1,6 @@
/*
* This file is part of the coreboot project.
- *
+ *
* Copyright (C) 2006 Indrek Kruusa <indrek.kruusa@artecdesign.ee>
* Copyright (C) 2006 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2007 Advanced Micro Devices, Inc.
@@ -25,200 +25,156 @@
;* SetDelayControl
;*
;*************************************************************************/
-static void SetDelayControl(void)
+#include "cpu/x86/msr.h"
+
+
+
+
+/**
+ * Delay Control Settings table from AMD (MCP 0x4C00000F).
+ */
+static const msrinit_t delay_msr_table[] = {
+ {CPU_BC_MSS_ARRAY_CTL0, {.hi = 0x00000000, .lo = 0x2814D352}},
+ {CPU_BC_MSS_ARRAY_CTL1, {.hi = 0x00000000, .lo = 0x1068334D}},
+ {CPU_BC_MSS_ARRAY_CTL2, {.hi = 0x00000106, .lo = 0x83104104}},
+};
+
+
+
+static const struct delay_controls {
+ u8 dimms;
+ u8 devices;
+ u32 slow_hi;
+ u32 slow_low;
+ u32 fast_hi;
+ u32 fast_low;
+} delay_control_table[] = {
+ /* DIMMs Devs Slow (<=333MHz) Fast (>334MHz) */
+ { 1, 4, 0x0837100FF, 0x056960004, 0x0827100FF, 0x056960004 },
+ { 1, 8, 0x0837100AA, 0x056960004, 0x0827100AA, 0x056960004 },
+ { 1, 16, 0x0837100AA, 0x056960004, 0x082710055, 0x056960004 },
+ { 2, 8, 0x0837100A5, 0x056960004, 0x082710000, 0x056960004 },
+ { 2, 16, 0x0937100A5, 0x056960004, 0x0C27100A5, 0x056960004 },
+ { 2, 20, 0x0B37100A5, 0x056960004, 0x0B27100A5, 0x056960004 },
+ { 2, 24, 0x0B37100A5, 0x056960004, 0x0B27100A5, 0x056960004 },
+ { 2, 32, 0x0B37100A5, 0x056960004, 0x0B2710000, 0x056960004 },
+};
+
+/*
+ * Bit 55 (disable SDCLK 1,3,5) should be set if there is a single DIMM
+ * in slot 0, but it should be clear for all 2 DIMM settings and if a
+ * single DIMM is in slot 1. Bits 54:52 should always be set to '111'.
+ *
+ * Settings for single DIMM and no VTT termination (like DB800 platform)
+ * 0xF2F100FF 0x56960004
+ * -------------------------------------
+ * ADDR/CTL have 22 ohm series R
+ * DQ/DQM/DQS have 33 ohm series R
+ */
+
+/**
+ * This is Black Magic DRAM timing juju[1].
+ *
+ * DRAM delay depends on CPU clock, memory bus clock, memory bus loading,
+ * memory bus termination, your middle initial (ha! caught you!), GeodeLink
+ * clock rate, and DRAM timing specifications.
+ *
+ * From this the code computes a number which is "known to work". No,
+ * hardware is not an exact science. And, finally, if an FS2 (JTAG debugger)
+ * is hooked up, then just don't do anything. This code was written by a master
+ * of the Dark Arts at AMD and should not be modified in any way.
+ *
+ * [1] (http://www.thefreedictionary.com/juju)
+ *
+ * @param dimm0 The SMBus address of DIMM 0 (mainboard dependent).
+ * @param dimm1 The SMBus address of DIMM 1 (mainboard dependent).
+ * @param terminated The bus is terminated. (mainboard dependent).
+ */
+static void SetDelayControl(u8 dimm0, u8 dimm1, int terminated)
{
- unsigned int msrnum, glspeed;
- unsigned char spdbyte0, spdbyte1;
+ u32 glspeed;
+ u8 spdbyte0, spdbyte1, dimms, i;
msr_t msr;
glspeed = GeodeLinkSpeed();
- /* fix delay controls for DM and IM arrays */
- msrnum = CPU_BC_MSS_ARRAY_CTL0;
- msr.hi = 0;
- msr.lo = 0x2814D352;
- wrmsr(msrnum, msr);
-
- msrnum = CPU_BC_MSS_ARRAY_CTL1;
- msr.hi = 0;
- msr.lo = 0x1068334D;
- wrmsr(msrnum, msr);
-
- msrnum = CPU_BC_MSS_ARRAY_CTL2;
- msr.hi = 0x00000106;
- msr.lo = 0x83104104;
- wrmsr(msrnum, msr);
+ /* Fix delay controls for DM and IM arrays. */
+ for (i = 0; i < ARRAY_SIZE(delay_msr_table); i++)
+ wrmsr(delay_msr_table[i].index, delay_msr_table[i].msr);
- msrnum = GLCP_FIFOCTL;
- msr = rdmsr(msrnum);
+ msr = rdmsr(GLCP_FIFOCTL);
msr.hi = 0x00000005;
- wrmsr(msrnum, msr);
+ wrmsr(GLCP_FIFOCTL, msr);
- /* Enable setting */
- msrnum = CPU_BC_MSS_ARRAY_CTL_ENA;
+ /* Enable setting. */
msr.hi = 0;
msr.lo = 0x00000001;
- wrmsr(msrnum, msr);
+ wrmsr(CPU_BC_MSS_ARRAY_CTL_ENA, msr);
- /* Debug Delay Control Setup Check
- Leave it alone if it has been setup. FS2 or something is here. */
- msrnum = GLCP_DELAY_CONTROLS;
- msr = rdmsr(msrnum);
- if (msr.lo & ~(0x7C0)) {
+ /* Debug Delay Control setup check.
+ * Leave it alone if it has been setup. FS2 or something is here.
+ */
+ msr = rdmsr(GLCP_DELAY_CONTROLS);
+ if (msr.lo & ~(DELAY_LOWER_STATUS_MASK))
return;
- }
- /*
- * Delay Controls based on DIMM loading. UGH!
- * # of Devices = Module Width (SPD6) / Device Width(SPD13) * Physical Banks(SPD5)
- * Note - We only support module width of 64.
+ /* Delay Controls based on DIMM loading. UGH!
+ * Number of devices = module width (SPD 6) / device width (SPD 13)
+ * * physical banks (SPD 5)
+ *
+ * Note: We only support a module width of 64.
*/
- spdbyte0 = spd_read_byte(DIMM0, SPD_PRIMARY_SDRAM_WIDTH);
+ dimms = 0;
+ spdbyte0 = spd_read_byte(dimm0, SPD_PRIMARY_SDRAM_WIDTH);
if (spdbyte0 != 0xFF) {
- spdbyte0 = (unsigned char)64 / spdbyte0 *
- (unsigned char)(spd_read_byte(DIMM0, SPD_NUM_DIMM_BANKS));
+ dimms++;
+ spdbyte0 = (u8)64 / spdbyte0 *
+ (u8)(spd_read_byte(dimm0, SPD_NUM_DIMM_BANKS));
} else {
spdbyte0 = 0;
}
- spdbyte1 = spd_read_byte(DIMM1, SPD_PRIMARY_SDRAM_WIDTH);
+ spdbyte1 = spd_read_byte(dimm1, SPD_PRIMARY_SDRAM_WIDTH);
if (spdbyte1 != 0xFF) {
- spdbyte1 = (unsigned char)64 / spdbyte1 *
- (unsigned char)(spd_read_byte(DIMM1, SPD_NUM_DIMM_BANKS));
+ dimms++;
+ spdbyte1 = (u8)64 / spdbyte1 *
+ (u8)(spd_read_byte(dimm1, SPD_NUM_DIMM_BANKS));
} else {
spdbyte1 = 0;
}
-/* The current thinking. Subject to change...
-
-; "FUTURE ROBUSTNESS" PROPOSAL
-; ----------------------------
-; DIMM Max MBUS MC 0x2000001A bits 26:24
-;DIMMs devices Frequency MCP 0x4C00000F Setting vvv
-;----- ------- --------- ---------------------- ----------
-;1 4 400MHz 0x82*100FF 0x56960004 4
-;1 8 400MHz 0x82*100AA 0x56960004 4
-;1 16 400MHz 0x82*10055 0x56960004 4
-;
-;2 4,4 400MHz 0x82710000 0x56960004 4
-;
-;1 4 <=333MHz 0x83*100FF 0x56960004 3
-;1 8 <=333MHz 0x83*100AA 0x56960004 3
-;1 16 <=333MHz 0x83*100AA 0x56960004 3
-;
-;2 4,4 <=333MHz 0x837100A5 0x56960004 3
-;2 8,8 <=333MHz 0x937100A5 0x56960004 3
-;
-;=========================================================================
-;* - Bit 55 (disable SDCLK 1,3,5) should be set if there is a single DIMM in slot 0,
-; but it should be clear for all 2 DIMM settings and if a single DIMM is in slot 1.
-; Bits 54:52 should always be set to '111'.
-
-;No VTT termination
-;-------------------------------------
-;ADDR/CTL have 22 ohm series R
-;DQ/DQM/DQS have 33 ohm series R
-;
-; DIMM Max MBUS
-;DIMMs devices Frequency MCP 0x4C00000F Setting
-;----- ------- --------- ----------------------
-;1 4 400MHz 0xF2F100FF 0x56960004 4 The No VTT changes improve timing.
-;1 8 400MHz 0xF2F100FF 0x56960004 4
-;1 4 <=333MHz 0xF2F100FF 0x56960004 3
-;1 8 <=333MHz 0xF2F100FF 0x56960004 3
-;1 16 <=333MHz 0xF2F100FF 0x56960004 3
-*/
+ /* Zero GLCP_DELAY_CONTROLS MSR */
msr.hi = msr.lo = 0;
- if (spdbyte0 == 0 || spdbyte1 == 0) {
- /* one dimm solution */
- if (spdbyte1 == 0) {
- msr.hi |= 0x000800000;
- }
- spdbyte0 += spdbyte1;
- if (spdbyte0 > 8) {
- /* large dimm */
- if (glspeed < 334) {
- msr.hi |= 0x0837100AA;
- msr.lo |= 0x056960004;
- } else {
- msr.hi |= 0x082710055;
- msr.lo |= 0x056960004;
- }
- } else if (spdbyte0 > 4) {
- /* medium dimm */
- if (glspeed < 334) {
- msr.hi |= 0x0837100AA;
- msr.lo |= 0x056960004;
- } else {
- msr.hi |= 0x0827100AA;
- msr.lo |= 0x056960004;
- }
- } else {
- /* small dimm */
- if (glspeed < 334) {
- msr.hi |= 0x0837100FF;
- msr.lo |= 0x056960004;
- } else {
- msr.hi |= 0x0827100FF;
- msr.lo |= 0x056960004;
- }
- }
- } else {
- /* two dimm solution */
- spdbyte0 += spdbyte1;
- if (spdbyte0 > 24) {
- /* huge dimms */
- if (glspeed < 334) {
- msr.hi |= 0x0B37100A5;
- msr.lo |= 0x056960004;
- } else {
- msr.hi |= 0x0B2710000;
- msr.lo |= 0x056960004;
- }
- } else if (spdbyte0 > 16) {
- /* large dimms */
- if (glspeed < 334) {
- msr.hi |= 0x0B37100A5;
- msr.lo |= 0x056960004;
- } else {
- msr.hi |= 0x0B27100A5;
- msr.lo |= 0x056960004;
- }
- } else if (spdbyte0 >= 8) {
- /* medium dimms */
- if (glspeed < 334) {
- msr.hi |= 0x0937100A5;
- msr.lo |= 0x056960004;
- } else {
- msr.hi |= 0x0C27100A5;
- msr.lo |= 0x056960004;
- }
- } else {
- /* small dimms */
+ /* Save some power, disable clock to second DIMM if it is empty. */
+ if (spdbyte1 == 0)
+ msr.hi |= DELAY_UPPER_DISABLE_CLK135;
+
+ spdbyte0 += spdbyte1;
+
+ if ((dimms == 1) && (terminated == DRAM_TERMINATED)) {
+ msr.hi = 0xF2F100FF;
+ msr.lo = 0x56960004;
+ } else for (i = 0; i < ARRAY_SIZE(delay_control_table); i++) {
+ if ((dimms == delay_control_table[i].dimms) &&
+ (spdbyte0 <= delay_control_table[i].devices)) {
if (glspeed < 334) {
- msr.hi |= 0x0837100A5;
- msr.lo |= 0x056960004;
+ msr.hi |= delay_control_table[i].slow_hi;
+ msr.lo |= delay_control_table[i].slow_low;
} else {
- msr.hi |= 0x082710000;
- msr.lo |= 0x056960004;
+ msr.hi |= delay_control_table[i].fast_hi;
+ msr.lo |= delay_control_table[i].fast_low;
}
+ break;
}
}
- print_debug("Try to write GLCP_DELAY_CONTROLS: hi ");
- print_debug_hex32(msr.hi);
- print_debug(" and lo ");
- print_debug_hex32(msr.lo);
- print_debug("\n");
wrmsr(GLCP_DELAY_CONTROLS, msr);
- print_debug("SetDelayControl done\n");
- return;
}
/* ***************************************************************************/
/* * cpuRegInit*/
/* ***************************************************************************/
-void cpuRegInit(void)
+void cpuRegInit(int debug_clock_disable, u8 dimm0, u8 dimm1, int terminated)
{
int msrnum;
msr_t msr;
@@ -259,7 +215,7 @@ void cpuRegInit(void)
/* Set the Delay Control in GLCP */
print_debug("Set the Delay Control in GLCP\n");
- SetDelayControl();
+ SetDelayControl(dimm0, dimm1, terminated);
/* Enable RSDC */
print_debug("Enable RSDC\n");
@@ -294,12 +250,12 @@ void cpuRegInit(void)
/* Disable the debug clock to save power. */
/* NOTE: leave it enabled for fs2 debug */
-#if 0
- msrnum = GLCP_DBGCLKCTL;
- msr.hi = 0;
- msr.lo = 0;
- wrmsr(msrnum, msr);
-#endif
+ if (debug_clock_disable && 0) {
+ msrnum = GLCP_DBGCLKCTL;
+ msr.hi = 0;
+ msr.lo = 0;
+ wrmsr(msrnum, msr);
+ }
/* Setup throttling delays to proper mode if it is ever enabled. */
print_debug("Setup throttling delays to proper mode\n");
diff --git a/src/cpu/amd/model_lx/msrinit.c b/src/cpu/amd/model_lx/msrinit.c
index 53c0a851dc..35c9ae4f25 100644
--- a/src/cpu/amd/model_lx/msrinit.c
+++ b/src/cpu/amd/model_lx/msrinit.c
@@ -18,13 +18,9 @@
*/
#include <stdlib.h>
+#include "cpu/x86/msr.h"
-struct msrinit {
- u32 msrnum;
- msr_t msr;
-};
-
-static const struct msrinit msr_table[] =
+static const msrinit_t msr_table[] =
{
{CPU_RCONF_DEFAULT, {.hi = 0x24fffc02,.lo = 0x1000A000}}, /* Setup access to cache under 1MB.
* Rom Properties: Write Serialize, WriteProtect.
@@ -49,7 +45,7 @@ static void msr_init(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(msr_table); i++)
- wrmsr(msr_table[i].msrnum, msr_table[i].msr);
+ wrmsr(msr_table[i].index, msr_table[i].msr);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 10:14:20 +0000