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mods for i855pm that don't seem too wrong. ha! 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1653 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ronald G. Minnich 2004-09-30 22:50:13 +00:00
parent a4779e80c3
commit ed9f18d545
2 changed files with 124 additions and 146 deletions
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2
src/mainboard/digitallogic/adl855pc/auto.c
View File

@ -61,7 +61,7 @@ static void main(void)
{
static const struct mem_controller memctrl[] = {
{
.d0 = PCI_DEV(0, 0, 0),
.d0 = PCI_DEV(0, 0, 1),
.channel0 = { (0xa<<3)|0, 0 },
},
};

264
src/northbridge/intel/i855pm/raminit.c
View File

@ -2,6 +2,20 @@
/* This was originally for the e7500, modified for i855pm
*/
/* the 855pm uses only
* memory type (must be ddr)
* number of row addresses, not counting bank addresses
* number of column addresses
* number of so-dimm banks
* ecc, no ecc
* refresh rate/type
* number banks on each device
*
* that's it. No other bytes are used.
* these are bytes
* 2, 3, 4, 5, 11, 12 17
*/
/* converted to C 6/2004 yhlu */
#define DEBUG_RAM_CONFIG 1
@ -152,7 +166,7 @@ static const long register_values[] = {
* granularity.
*/
/* Conservatively say each row has 32MB of ram, we will fix this up later */
0x60, 0x00000000, (0x01 << 0) | (0x02 << 8) | (0x03 << 16) | (0x04 << 24),
0x40, 0x00000000, (0x01 << 0) | (0x02 << 8) | (0x03 << 16) | (0x04 << 24),
/* DRA - DRAM Row Attribute Register
* 0x70 Row 0,1
* 0x71 Row 2,3
@ -175,85 +189,68 @@ static const long register_values[] = {
(((0<<3)|(0<<0))<<28),
*/
/* DRT - DRAM Time Register
* 0x78
* [31:31] Additional CKE to CS Clock for Read/Write
* [30:30] Additional CKE to CS clock for Precharge/Activate
* [29:29] Back to Back Write-Read Turn Around
* Intel recommends set to 1
* 0x60
* [31:31] tWTR -- MBZ
* [30:30] tWR 0 is 2, 1 is 3 clocks
* [29:28] back to back write-read commands spacing
* different rows
* 00 4, 01 3, 10 2, 11 reserved
*
* [28:28] Back to Back Read-Write Turn Around
* Intel recommends 0 for CL 2.5 and 1 for CL 2
* [27:26] same or different
* CL + .5x BL + TA(RD-WR) - DQSS
* wow that's hard!
* 00 7, 01 6, 10 5, 11 4
* 00 4, 01 3, 10 2, 11 reserved
*
* [27:27] Back to Back Read Turn Around
* Intel recommends 1 for all configs
* [25:25] Back to Back Read-read spacing
* .5xBL + TA(RD-RD)
* 0 4 , 1 3
*
* [26:24] Read Delay (tRD)
* 000 == 9 clocks
* 001 == 8 clocks
* 010 == 7 clocks
* 011 == 6 clocks
* 100 == 5 clocks
* 101 == 4 clocks
* 110 == 3 clocks
* Others == Reserved
* [23:20] Reserved
* [19:19] No Wake for DDR page closes
* 0 is default
* [18:16] Page Close Counter
* 000 == infinite
* 010 == 8-15 clocks
* 011 == 16-31 clocks
* 100 == 64-127 clocks
* 101 == 128-255 clocks
* 110 == 192-383 clocks
* 111 == 255-510 clocks
* [24:15] Reserved
*
* [14:12] Refresh cycle time
* 000 14, 001 13, 010 12, 011 11, 100 10, 101 9, 110 8, 111 7
*
* [11:11] tRAS, max
* 0 120 us, 1 reserved
*
* [15:12] Reserved
* [11:11] DQS Slave DLL Dynamic Management
* power saving, when set to 1, slave DLLS disabled
* we'll leave it at 0 for now
* [10:09] Active to Precharge (tRAS)
* 00 == 7 clocks
* 01 == 6 clocks
* 10 == 5 clocks
* 11 == Reserved
* [08:06] Reserved
* [05:04] Cas Latency (tCL)
* 00 == 8 clocks
* 01 == 7 clocks
* 10 == 6 clocks
* 11 == 5 clocks
* [08:07] Reserved
* [06:05] Cas Latency (tCL)
* 00 == 2.5 Clocks
* 01 == 2.0 Clocks (default)
* 10 == 1.5 Clocks
* 10 == Reserved
* 11 == Reserved
* [03:03] Reserved
* [02:02] Ras# to Cas# Delay (tRCD)
* 0 == 3 DRAM Clocks
* 1 == 2 DRAM Clocks
* [01:01] Reserved
* [00:00] DRAM RAS# to Precharge (tRP)
* 0 == 3 DRAM Clocks
* 1 == 2 DRAM Clocks
* [04:04] Reserved
* [03:02] Ras# to Cas# Delay (tRCD)
* 00 == 4 DRAM Clocks
* 01 == 3 DRAM Clocks
* 10 == 2 DRAM Clocks
* 11 == reserved
* [01:00] DRAM RAS# to Precharge (tRP)
* 00 == 4 DRAM Clocks
* 01 == 3 DRAM Clocks
* 10 == 2 DRAM Clocks
* 11 == reserved
*/
#define DRT_CAS_2_5 (0<<4)
#define DRT_CAS_2_0 (1<<4)
#define DRT_CAS_1_5 (2<<4)
#define DRT_CAS_MASK (3<<4)
#define DRT_CAS_2_5 (0<<5)
#define DRT_CAS_2_0 (1<<5)
#define DRT_CAS_MASK (3<<5)
#if CAS_LATENCY == CAS_2_5
#define DRT_CL DRT_CAS_2_5
#elif CAS_LATENCY == CAS_2_0
#define DRT_CL DRT_CAS_2_0
#elif CAS_LATENCY == CAS_1_5
#define DRT_CL DRT_CAS_1_5
#endif
/* Most unaggressive settings possible */
/* clear bits 26:24,18:16,11,10:9,5:4,2:2,0 */
/* ~ (7<<26)|(7<<18)|(1<<11)|(3<<10)|(3<<5)|(1<<2)|1 */
// 0x78, 0xc0fff8c4, (1<<29)|(1<<28)|(1<<27)|(2<<24)|(2<<9)|DRT_CL|(1<<3)|(1<<1)|(1<<0),
// 0x78, 0xc0f8f8c0, (1<<29)|(1<<28)|(1<<27)|(1<<24)|(1<<16)|(2<<9)|DRT_CL|(1<<3)|(3<<1)|(1<<0),
// 0x78, 0xc0f8f9c0, (1<<29)|(1<<28)|(1<<27)|(1<<24)|(1<<16)|(2<<9)|DRT_CL|(1<<3)|(3<<1)|(1<<0),
0x78, ~((7<<26)|(7<<18)|(1<<11)|(3<<10)|(3<<5)|(1<<2)|1),
(1<<29)|(1<<28)|(9<<26)|(0<<18)|(0<<11)|(0<<10)|(0<<5)|(0<<2)|(0<<0),
/* bios is 0x2a004425 */
/* default hardware is 18004425 */
/* no setting for now */
/* FDHC - Fixed DRAM Hole Control
* 0x97
@ -332,11 +329,7 @@ static const long register_values[] = {
* [03:01] Reserved
* [00:00] DRAM type --hardwired to 1 to indicate DDR
*/
// .long 0x7c, 0xffcefcff, (1<<22)|(2 << 20)|(1 << 16)| (0 << 8),
// .long 0x7c, 0xff8cfcff, (1<<22)|(2 << 20)|(1 << 17)|(1 << 16)| (0 << 8),
// .long 0x7c, 0xff80fcff, (1<<22)|(2 << 20)|(1 << 18)|(1 << 17)|(1 << 16)| (0 << 8),
// 0x7c, 0xff82fcff, (1<<22)|(2 << 20)|(1 << 18)|(1 << 16)| (0 << 8),
0x7c, 0xff82f8ff, (1<<22)|(2 << 20)|(1 << 18)|(1 << 16)| (0 << 8),
0x70, 0xdf0f6c7f, 0,
};
@ -501,7 +494,7 @@ static void ram_set_d0f0_regs(const struct mem_controller *ctrl) {
#endif
}
static void sdram_set_registers(const struct mem_controller *ctrl){
ram_set_rcomp_regs(ctrl);
// ram_set_rcomp_regs(ctrl);
ram_set_d0f0_regs(ctrl);
}
@ -771,7 +764,7 @@ hw_err:
*/
static long spd_set_row_attributes(const struct mem_controller *ctrl, long dimm_mask) {
int i;
uint32_t dword=0;
uint16_t word=0x7777;
int value;
@ -803,14 +796,17 @@ static long spd_set_row_attributes(const struct mem_controller *ctrl, long dimm_
print_err("unsupported page size\r\n");
}
/* double because I have 2 channels */
sz.side1++;
/* Convert to the format needed for the DRA register */
/* subtract 3 (there are 8 bytes)
* then subtract 11
* (since 12 bit size should map to a value of 1)
* so subtract 14 total
*/
sz.side1-=14;
/* Place in the %ebp the dra place holder */ //i
dword |= sz.side1<<(i<<3);
word &= ~(7<<i);
word |= sz.side1<<(i<<3);
/* Test to see if the second side is present */
@ -821,47 +817,20 @@ static long spd_set_row_attributes(const struct mem_controller *ctrl, long dimm_
print_err("unsupported page size\r\n");
}
/* double because I have 2 channels */
sz.side2++;
/* Convert to the format needed for the DRA register */
sz.side2-=14;
/* Place in the %ebp the dra place holder */ //i
dword |= sz.side2<<((i<<3) + 4 );
word &= ~(7<<i);
word |= sz.side2<<((i<<3) + 4 );
}
}
/* Now add the SDRAM chip width to the DRA */
struct dimm_width wd;
wd = sdram_spd_get_width(ctrl->channel0[i]);
#if DEBUG_RAM_CONFIG
print_debug("width =");
print_debug_hex32(wd.side1);
print_debug(" ");
print_debug_hex32(wd.side2);
print_debug("\r\n");
#endif
if(wd.side1 == 0) continue;
if(wd.side1 == 4) {
/* Enable an x4 device */
dword |= 0x08 << (i<<3);
}
if(wd.side2 == 0) continue;
if(wd.side2 == 4) {
/* Enable an x4 device */
dword |= 0x08 << ((i<<3 ) + 4);
}
/* go to the next DIMM */
}
/* Write the new row attributes register */
pci_write_config32(ctrl->d0, 0x70, dword);
pci_write_config32(ctrl->d0, 0x50, word);
return dimm_mask;
@ -1122,9 +1091,9 @@ static const uint32_t refresh_rate_index[] = {
* 7.8us -> 7.8us
* 31.3s -> 15.6us
* 62.5us -> 15.6us
* 125us -> 64us
* 125us -> 15.6us
*/
1, 0xff, 2, 1, 1, 3
1, 0xff, 2, 1, 1, 1
};
#define MAX_SPD_REFRESH_RATE 5
@ -1135,9 +1104,19 @@ static long spd_set_dram_controller_mode (const struct mem_controller *ctrl, lon
int value;
uint32_t ecx;
uint32_t edx;
/* on this chipset we only do refresh "slow" or "fast" for now */
/* we start out assuming "slow" (15.6 microseconds) */
uint32_t refrate = 1; /* better than 7.8 */
/* Read the inititial state */
dword = pci_read_config32(ctrl->d0, 0x7c);
dword = pci_read_config32(ctrl->d0, 0x70);
// WTF?
//dword |= 0x10000;
#if 0 // DEBUG_RAM_CONFIG
print_debug("spd_detect_dimms: 0x70.l is:");
print_debug_hex32(dword);
print_debug("\r\n");
#endif
#if 0
/* Test if ECC cmos option is enabled */
@ -1165,8 +1144,17 @@ static long spd_set_dram_controller_mode (const struct mem_controller *ctrl, lon
value = spd_read_byte(ctrl->channel0[i], 11); /* SDRAM type */
if(value < 0) continue;
if(value !=2 ) {
#if DEBUG_RAM_CONFIG
print_debug("spd_detect_dimms:\r\n");
#endif
/* Clear the ecc enable */
dword &= ~(3 << 20);
#if 0 &&DEBUG_RAM_CONFIG
print_debug("spd_detect_dimms: no ecc so set:");
print_debug_hex32(dword);
print_debug("\r\n");
#endif
}
value = spd_read_byte(ctrl->channel0[i], 12); /* SDRAM refresh rate */
if(value < 0 ) continue;
@ -1174,34 +1162,36 @@ static long spd_set_dram_controller_mode (const struct mem_controller *ctrl, lon
if(value > MAX_SPD_REFRESH_RATE) { print_err("unsupported refresh rate\r\n");}
// if(value == 0xff) { print_err("unsupported refresh rate\r\n");}
ecx = refresh_rate_index[value];
/* Isolate the old refresh rate setting */
/* Load the refresh rate ranks */
edx = refresh_rate_rank[(dword >> 8) & 3]<<8;
edx |= refresh_rate_rank[ecx] & 0xff;
/* See if the new refresh rate is more conservative than the old
* refresh rate setting. (Lower ranks are more conservative)
*/
if((edx & 0xff)< ((edx >> 8) & 0xff) ) {
/* Clear the old refresh rate */
dword &= ~(3<<8);
/* Move in the new refresh rate */
dword |= (ecx<<8);
}
#if DEBUG_RAM_CONFIG
print_debug("spd_detect_dimms: ref rate index:");
print_debug_hex8(value);
print_debug("\r\n");
#endif
if (value == 2) /* have to go faster */
refrate = 2;
#if 0 &&DEBUG_RAM_CONFIG
print_debug("spd_detect_dimms: dword is now w/refresh:");
print_debug_hex32(dword);
print_debug("\r\n");
#endif
/* no applicability here but there are similar things
* we'll try later.
*/
#if 0
value = spd_read_byte(ctrl->channel0[i], 33); /* Address and command hold time after clock */
if(value < 0) continue;
if(value >= 0xa0) { /* At 133Mhz this constant should be 0x75 */
dword &= ~(1<<16); /* Use two clock cyles instead of one */
}
#endif
/* go to the next DIMM */
}
/* set the refrate now */
dword |= (refrate << 7);
/* Now write the controller mode */
pci_write_config32(ctrl->d0, 0x7c, dword);
pci_write_config32(ctrl->d0, 0x70, dword);
return dimm_mask;
@ -1396,7 +1386,7 @@ static long spd_set_dram_timing(const struct mem_controller *ctrl, long dimm_mas
int value;
/* Read the inititial state */
dword = pci_read_config32(ctrl->d0, 0x78);
dword = pci_read_config32(ctrl->d0, 0x60);
#if 0
# Intel clears top bit here, should we?
# No the default is on and for normal timming it should be on. Tom Z
@ -1404,6 +1394,7 @@ static long spd_set_dram_timing(const struct mem_controller *ctrl, long dimm_mas
#endif
HERE. WHat's the frequency kenneth?
for(i = 0; i < DIMM_SOCKETS; i++) {
if (!(dimm_mask & (1 << i))) {
continue;
@ -1485,7 +1476,7 @@ static long spd_set_dram_timing(const struct mem_controller *ctrl, long dimm_mas
dword |= (1<<29);
}
pci_write_config32(ctrl->d0, 0x78, dword);
pci_write_config32(ctrl->d0, 0x60, dword);
return dimm_mask;
@ -1512,23 +1503,7 @@ static unsigned int spd_detect_dimms(const struct mem_controller *ctrl)
dimm_mask |= (1 << i);
}
}
#if 0
device = ctrl->channel1[i];
if (device) {
byte = spd_read_byte(ctrl->channel1[i], 2);
if (byte == 7) {
dimm_mask |= (1 << (i + DIMM_SOCKETS));
}
}
#endif
}
#if 1
i = (dimm_mask>>DIMM_SOCKETS);
if(i != (dimm_mask & ( (1<<DIMM_SOCKETS) - 1) ) ) {
die("now we only support dual channel\r\n");
}
#endif
return dimm_mask;
}
@ -1661,12 +1636,15 @@ static void sdram_set_spd_registers(const struct mem_controller *ctrl) {
print_debug(spd_pre_set);
#endif
dimm_mask = spd_set_row_attributes(ctrl,dimm_mask);
if (dimm_mask < 0)
goto hw_spd_err;
dimm_mask = spd_set_dram_controller_mode(ctrl,dimm_mask);
if (dimm_mask < 0)
goto hw_spd_err;
dimm_mask = spd_set_cas_latency(ctrl,dimm_mask);
dump_pci_device(PCI_DEV(0,0,1));
if (dimm_mask < 0)
goto hw_spd_err;
dimm_mask = spd_set_dram_timing(ctrl,dimm_mask);