-#include <cpu/p6/mtrr.h>
+#include <cpu/x86/mtrr.h>
#include "raminit.h"
/*
#define DIMM_CL2 0
#endif
-void dimms_read(unsigned long x)
+void dimms_read(unsigned long x)
{
uint8_t c;
- unsigned long eax;
+ unsigned long eax;
volatile unsigned long y;
- eax = x;
- for(c = 0; c < 6; c++) {
-
- print_err("dimms_read: ");
- print_err_hex32(eax);
- print_err("\r\n");
- y = * (volatile unsigned long *) eax;
+ eax = x;
+ for (c = 0; c < 6; c++) {
+ y = *(volatile unsigned long *) eax;
eax += 0x10000000;
}
}
-void dimms_write(int x)
+void dimms_write(int x)
{
uint8_t c;
unsigned long eax = x;
- for(c = 0; c < 6; c++) {
- print_err("dimms_write: ");
- print_err_hex32(eax);
- print_err("\r\n");
+ for (c = 0; c < 6; c++) {
*(volatile unsigned long *) eax = 0;
eax += 0x10000000;
}
}
-
-
#ifdef DEBUG_SETNORTHB
-void setnorthb(device_t north, uint8_t reg, uint8_t val)
+void setnorthb(device_t north, uint8_t reg, uint8_t val)
{
- print_err("setnorth: reg ");
- print_err_hex8(reg);
- print_err(" to ");
- print_err_hex8(val);
- print_err("\r\n");
+ print_debug("setnorth: reg ");
+ print_debug_hex8(reg);
+ print_debug(" to ");
+ print_debug_hex8(val);
+ print_debug("\r\n");
pci_write_config8(north, reg, val);
}
#else
#define setnorthb pci_write_config8
#endif
-void
-dumpnorth(device_t north)
+void dumpnorth(device_t north)
{
- uint8_t r, c;
- for(r = 0; r < 256; r += 16) {
- print_err_hex8(r);
- print_err(":");
- for(c = 0; c < 16; c++) {
- print_err_hex8(pci_read_config8(north, r+c));
- print_err(" ");
+ unsigned int r, c;
+ for (r = 0;; r += 16) {
+ print_debug_hex8(r);
+ print_debug(":");
+ for (c = 0; c < 16; c++) {
+ print_debug_hex8(pci_read_config8(north, r + c));
+ print_debug(" ");
}
- print_err("\r\n");
- }
+ print_debug("\r\n");
+ if (r >= 240)
+ break;
+ }
}
-static void sdram_set_registers(const struct mem_controller *ctrl)
+static void sdram_set_registers(const struct mem_controller *ctrl)
{
- static const uint16_t raminit_ma_reg_table[] = {
- /* Values for MA type register to try */
- 0x0000, 0x8088, 0xe0ee,
- 0xffff // end mark
- };
- static const unsigned char ramregs[] = {0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
- 0x56, 0x57};
-
- device_t north = (device_t) 0;
+ device_t north = (device_t) PCI_DEV(0, 0, 0);
uint8_t c, r;
- print_err("vt8601 init starting\n");
- north = pci_locate_device(PCI_ID(0x1106, 0x8601), 0);
- north = 0;
- print_err_hex32(north);
- print_err(" is the north\n");
- print_err_hex16(pci_read_config16(north, 0));
- print_err(" ");
- print_err_hex16(pci_read_config16(north, 2));
- print_err("\r\n");
-
+ print_err("vt8601 init starting\r\n");
+ print_debug_hex32(north);
+ print_debug(" is the north\n");
+ print_debug_hex16(pci_read_config16(north, 0));
+ print_debug(" ");
+ print_debug_hex16(pci_read_config16(north, 2));
+ print_debug("\r\n");
+
/* All we are doing now is setting initial known-good values that will
* be revised later as we read SPD
- */
+ */
+
// memory clk enable. We are not using ECC
- pci_write_config8(north,0x78, 0x01);
- print_err_hex8(pci_read_config8(north, 0x78));
+ pci_write_config8(north, 0x78, 0x01);
+ print_debug_hex8(pci_read_config8(north, 0x78));
+
// dram control, see the book.
#if DIMM_PC133
- pci_write_config8(north,0x68, 0x52);
+ pci_write_config8(north, 0x68, 0x52);
#else
- pci_write_config8(north,0x68, 0x42);
+ pci_write_config8(north, 0x68, 0x42);
#endif
+
// dram control, see the book.
- pci_write_config8(north,0x6B, 0x0c);
+ pci_write_config8(north, 0x6B, 0x0c);
+
// Initial setting, 256MB in each bank, will be rewritten later.
- pci_write_config8(north,0x5A, 0x20);
- print_err_hex8(pci_read_config8(north, 0x5a));
- pci_write_config8(north,0x5B, 0x40);
- pci_write_config8(north,0x5C, 0x60);
- pci_write_config8(north,0x5D, 0x80);
- pci_write_config8(north,0x5E, 0xA0);
- pci_write_config8(north,0x5F, 0xC0);
+ pci_write_config8(north, 0x5A, 0x20);
+ print_debug_hex8(pci_read_config8(north, 0x5a));
+ pci_write_config8(north, 0x5B, 0x40);
+ pci_write_config8(north, 0x5C, 0x60);
+ pci_write_config8(north, 0x5D, 0x80);
+ pci_write_config8(north, 0x5E, 0xA0);
+ pci_write_config8(north, 0x5F, 0xC0);
// It seems we have to take care of these 2 registers as if
// they are bank 6 and 7.
- pci_write_config8(north,0x56, 0xC0);
- pci_write_config8(north,0x57, 0xC0);
-
+ pci_write_config8(north, 0x56, 0xC0);
+ pci_write_config8(north, 0x57, 0xC0);
+
// SDRAM in all banks
- pci_write_config8(north,0x60, 0x3F);
+ pci_write_config8(north, 0x60, 0x3F);
+
// DRAM timing. I'm suspicious of this
// This is for all banks, 64 is 0,1. 65 is 2,3. 66 is 4,5.
// ras precharge 4T, RAS pulse 5T
// cas2 is 0xd6, cas3 is 0xe6
// we're also backing off write pulse width to 2T, so result is 0xee
#if DIMM_CL2
- pci_write_config8(north,0x64, 0xd4);
- pci_write_config8(north,0x65, 0xd4);
- pci_write_config8(north,0x66, 0xd4);
-#else // CL=3
- pci_write_config8(north,0x64, 0xe4);
- pci_write_config8(north,0x65, 0xe4);
- pci_write_config8(north,0x66, 0xe4);
+ pci_write_config8(north, 0x64, 0xd4);
+ pci_write_config8(north, 0x65, 0xd4);
+ pci_write_config8(north, 0x66, 0xd4);
+#else // CL=3
+ pci_write_config8(north, 0x64, 0xe4);
+ pci_write_config8(north, 0x65, 0xe4);
+ pci_write_config8(north, 0x66, 0xe4);
#endif
// dram frequency select.
// enable 4K pages for 64M dram.
#if DIMM_PC133
- pci_write_config8(north,0x69, 0x3c);
+ pci_write_config8(north, 0x69, 0x3c);
#else
- pci_write_config8(north,0x69, 0xac);
+ pci_write_config8(north, 0x69, 0xac);
#endif
/* IMPORTANT -- disable refresh counter */
// refresh counter, disabled.
- pci_write_config8(north,0x6A, 0x00);
-
+ pci_write_config8(north, 0x6A, 0x00);
// clkenable configuration. kevinh FIXME - add precharge
- pci_write_config8(north,0x6C, 0x00);
+ pci_write_config8(north, 0x6C, 0x00);
// dram read latch delay of 1 ns, MD drive 8 mA,
- // high drive strength on MA[2: 13], we#, cas#, ras#
+ // high drive strength on MA[2: 13], we#, cas#, ras#
// As per Cindy Lee, set to 0x37, not 0x57
- pci_write_config8(north,0x6D, 0x7f);
-
- /* Initialize all banks at once */
-
+ pci_write_config8(north, 0x6D, 0x7f);
}
-/* slot is the dram slot. Base is the *8M base. */
-static unsigned char
-do_module_size(unsigned char slot /*, unsigned char base) */)
-{
- static const unsigned char log2[256] = {
- [1] = 0, [2] = 1, [4] = 2, [8] = 3,
- [16]=4, [32]=5, [64]=6,
- [128]=7
- };
- static const uint8_t ramregs[] = {0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
- 0x56, 0x57};
- device_t north = 0;
+/* slot is the dram slot. Return size of side0 in lower 16-bit,
+ * side1 in upper 16-bit, in units of 8MB */
+static unsigned long spd_module_size(unsigned char slot)
+{
/* for all the DRAMS, see if they are there and get the size of each
* module. This is just a very early first cut at sizing.
*/
/* we may run out of registers ... */
- unsigned char width, banks, rows, cols, reg;
- unsigned char value = 0;
- unsigned char module = 0xa1 | (slot << 1);
+ unsigned int banks, rows, cols, reg;
+ unsigned int value = 0;
+ /* unsigned int module = ((0x50 + slot) << 1) + 1; */
+ unsigned int module = 0x50 + slot;
+
/* is the module there? if byte 2 is not 4, then we'll assume it
* is useless.
*/
- if (smbus_read_byte(module, 2) != 4)
- goto done;
-
- //print_err_hex8(slot);
- // print_err(" is SDRAM\n");
- width = smbus_read_byte(module, 6) | (smbus_read_byte(module,7)<<0);
+ print_info("Slot ");
+ print_info_hex8(slot);
+ if (smbus_read_byte(module, 2) != 4) {
+ print_info(" is empty\r\n");
+ return 0;
+ }
+ print_info(" is SDRAM ");
+
banks = smbus_read_byte(module, 17);
+
/* we're going to assume symmetric banks. Sorry. */
- cols = smbus_read_byte(module, 4) & 0xf;
- rows = smbus_read_byte(module, 3) & 0xf;
+ cols = smbus_read_byte(module, 4) & 0xf;
+ rows = smbus_read_byte(module, 3) & 0xf;
+
/* grand total. You have rows+cols addressing, * times of banks, times
- * width of data in bytes*/
- /* do this in terms of address bits. Then subtract 23 from it.
- * That might do it.
- */
- value = cols + rows + log2[banks] + log2[width];
- value -= 23;
- /* now subtract 3 more bits as these are 8-bit bytes */
- value -= 3;
- // print_err_hex8(value);
- // print_err(" is the # bits for this bank\n");
- /* now put that size into the correct register */
- value = (1 << value);
- done:
- reg = ramregs[slot];
-
- // print_err_hex8(value); print_err(" would go into ");
- // print_err_hex8(ramregs[reg]); print_err("\n");
- // pci_write_config8(north, ramregs[reg], value);
+ * width of data in bytes */
+ /* Width is assumed to be 64 bits == 8 bytes */
+ value = (1 << (cols + rows)) * banks * 8;
+ print_info_hex32(value);
+ print_info(" bytes ");
+ /* Return in 8MB units */
+ value >>= 23;
+
+ /* We should have single or double side */
+ if (smbus_read_byte(module, 5) == 2) {
+ print_info("x2");
+ value = (value << 16) | value;
+ }
+ print_info("\r\n");
return value;
+
+}
+
+static int spd_num_chips(unsigned char slot)
+{
+ unsigned int module = 0x50 + slot;
+ unsigned int width;
+
+ width = smbus_read_byte(module, 13);
+ if (width == 0)
+ width = 8;
+ return 64 / width;
}
static void sdram_set_spd_registers(const struct mem_controller *ctrl)
unsigned char Trp = 1, Tras = 1, casl = 2, val;
unsigned char timing = 0xe4;
/* read Trp */
- val = smbus_read_byte(0xa0, 27);
- if (val < 2*T133)
+ val = smbus_read_byte(0x50, 27);
+ if (val < 2 * T133)
Trp = 1;
- val = smbus_read_byte(0xa0, 30);
- if (val < 5*T133)
+ val = smbus_read_byte(0x50, 30);
+ if (val < 5 * T133)
Tras = 0;
- val = smbus_read_byte(0xa0, 18);
+ val = smbus_read_byte(0x50, 18);
if (val < 8)
casl = 1;
if (val < 4)
casl = 0;
-
+
val = (Trp << 7) | (Tras << 6) | (casl << 4) | 4;
-
- print_err_hex8(val); print_err(" is the computed timing\n");
+
+ print_debug_hex8(val);
+ print_debug(" is the computed timing\n");
/* don't set it. Experience shows that this screwy chipset should just
* be run with the most conservative timing.
* pci_write_config8(0, 0x64, val);
*/
}
-static void sdram_enable(int controllers, const struct mem_controller *ctrl)
+static void set_ma_mapping(device_t north, int slot, int type)
+{
+ unsigned char reg, val;
+ int shift;
+
+ reg = 0x58 + slot / 2;
+ if (slot % 2 >= 1)
+ shift = 0;
+ else
+ shift = 4;
+
+ val = pci_read_config8(north, reg);
+ val &= ~(0xf << shift);
+ val |= type << shift;
+ pci_write_config8(north, reg, val);
+}
+
+
+static void sdram_enable(int controllers, const struct mem_controller *ctrl)
{
unsigned char i;
- static const uint16_t raminit_ma_reg_table[] = {
- /* Values for MA type register to try */
- 0x0000, 0x8088, 0xe0ee,
- 0xffff // end mark
- };
static const uint8_t ramregs[] = {
0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x56, 0x57
};
-
device_t north = 0;
- uint8_t c, r, base;
- /* begin to initialize*/
+ uint32_t size, base, slot, ma;
+ /* begin to initialize */
+
// I forget why we need this, but we do
dimms_write(0xa55a5aa5);
-
- /* set NOP*/
- pci_write_config8(north,0x6C, 0x01);
- print_err("NOP\r\n");
- /* wait 200us*/
+
+ /* set NOP */
+ pci_write_config8(north, 0x6C, 0x01);
+ print_debug("NOP\r\n");
+ /* wait 200us */
// You need to do the memory reference. That causes the nop cycle.
dimms_read(0);
udelay(400);
- print_err("PRECHARGE\r\n");
+ print_debug("PRECHARGE\r\n");
/* set precharge */
- pci_write_config8(north,0x6C, 0x02);
- print_err("DUMMY READS\r\n");
- /* dummy reads*/
+ pci_write_config8(north, 0x6C, 0x02);
+ print_debug("DUMMY READS\r\n");
+ /* dummy reads */
dimms_read(0);
udelay(200);
- print_err("CBR\r\n");
- /* set CBR*/
- pci_write_config8(north,0x6C, 0x04);
-
- /* do 8 reads and wait >100us between each - from via*/
+ print_debug("CBR\r\n");
+ /* set CBR */
+ pci_write_config8(north, 0x6C, 0x04);
+
+ /* do 8 reads and wait >100us between each - from via */
dimms_read(0);
udelay(200);
dimms_read(0);
udelay(200);
dimms_read(0);
udelay(200);
- print_err("MRS\r\n");
- /* set MRS*/
- pci_write_config8(north,0x6c, 0x03);
+ print_debug("MRS\r\n");
+ /* set MRS */
+ pci_write_config8(north, 0x6c, 0x03);
#if DIMM_CL2
dimms_read(0x150);
-#else // CL=3
+#else // CL=3
dimms_read(0x1d0);
#endif
udelay(200);
- print_err("NORMAL\r\n");
+ print_debug("NORMAL\r\n");
/* set to normal mode */
- pci_write_config8(north,0x6C, 0x08);
-
+ pci_write_config8(north, 0x6C, 0x08);
+
dimms_write(0x55aa55aa);
dimms_read(0);
udelay(200);
- print_err("set ref. rate\r\n");
+ print_debug("set ref. rate\r\n");
// Set the refresh rate.
#if DIMM_PC133
- pci_write_config8(north,0x6A, 0x86);
+ pci_write_config8(north, 0x6A, 0x86);
#else
- pci_write_config8(north,0x6A, 0x65);
+ pci_write_config8(north, 0x6A, 0x65);
#endif
- print_err("enable multi-page open\r\n");
+ print_debug("enable multi-page open\r\n");
// enable multi-page open
- pci_write_config8(north,0x6B, 0x0d);
-
- /* Begin auto-detection
- * Find the first bank with DIMM equipped. */
-
- /* Maximum possible memory in bank 0, none in other banks.
- * Starting from bank 0, we fill 0 in these registers
- * until memory is found. */
- pci_write_config8(north,0x5A, 0xff);
- pci_write_config8(north,0x5B, 0xff);
- pci_write_config8(north,0x5C, 0xff);
- pci_write_config8(north,0x5D, 0xff);
- pci_write_config8(north,0x5E, 0xff);
- pci_write_config8(north,0x5F, 0xff);
- pci_write_config8(north,0x56, 0xff);
- pci_write_config8(north,0x57, 0xff);
- dumpnorth(north);
- print_err("MA\r\n");
- for(c = 0; c < 8; c++) {
- /* Write different values to 0 and 8, then read from 0.
- * If values of address 0 match, we have something there. */
- print_err("write to 0\r\n");
- *(volatile unsigned long *) 0 = 0x12345678;
-
- /* LEAVE THIS HERE. IT IS ESSENTIAL. OTHERWISE BUFFERING
- * WILL FOOL YOU!
- */
- print_err("write to 8\r\n");
- *(volatile unsigned long *) 8 = 0x87654321;
-
- if (*(volatile unsigned long *) 0 != 0x12345678) {
- print_err("no memory in this bank\r\n");
- /* No memory in this bank. Tell it to the bridge. */
- pci_write_config8(north,ramregs[c], 0);
- }
- /* found something */
- {
- uint8_t best = 0;
-
- /* Detect MA mapping type of the bank. */
-
- for(r = 0; r < 3; r++) {
- volatile unsigned long esi = 0;
- volatile unsigned long eax = 0;
- pci_write_config8(north,0x58, raminit_ma_reg_table[r]);
-
- * (volatile unsigned long *) eax = 0;
- print_err(" done write to eax\r\n");
- // Write to addresses with only one address bit
- // on, from 0x80000000 to 0x00000008 (lower 3 bits
- // are ignored, assuming 64-bit bus). Then what
- // is read at address 0 is the value written to
- // the lowest address where it gets
- // wrap-around. That address is either the size of
- // the bank, or a missing bit due to incorrect MA
- // mapping.
- eax = 0x80000000;
- while (eax != 4) {
- * (volatile unsigned long *) eax = eax;
- //print_err_hex32(eax);
- outb(eax&0xff, 0x80);
- eax >>= 1;
- }
- print_err(" done read to eax\r\n");
- eax = * (unsigned long *)0;
- /* oh boy ... what is this.
- movl 0, %eax
- cmpl %eax, %esi
- jnc 3f
- */
- print_err("eax and esi: ");
- print_err_hex32(eax); print_err(" ");
- print_err_hex32(esi); print_err("\r\n");
-
- if (eax > esi) { /* ??*/
-
- // This is the current best MA mapping.
- // Save the address and its MA mapping value.
- best = r;
- esi = eax;
- }
- }
-
- pci_write_config8(north,0x58, raminit_ma_reg_table[best]);
- print_err("enabled first bank of ram ... ma is ");
- print_err_hex8(pci_read_config8(north, 0x58));
- print_err("\r\n");
- }
- }
+ pci_write_config8(north, 0x6B, 0x0d);
+
base = 0;
- /* runs out of variable space. */
- /* this is unrolled and constants used as much as possible to help
- * us not run out of registers.
- * we'll run out of code space instead :-)
- */
- // for(i = 0; i < 8; i++)
- base = do_module_size(0); /*, base);*/
- pci_write_config8(north, ramregs[0], base);
- base += do_module_size(1); /*, base);*/
- pci_write_config8(north, ramregs[1], base);
- /* runs out of code space. */
- for(i = 2; i < 8; i++){
- pci_write_config8(north, ramregs[i], base);
- /*
- pci_write_config8(north, ramregs[3], base);
- pci_write_config8(north, ramregs[4], base);
- pci_write_config8(north, ramregs[5], base);
- pci_write_config8(north, ramregs[6], base);
- pci_write_config8(north, ramregs[7], base);
- */
+ for (slot = 0; slot < 4; slot++) {
+ size = spd_module_size(slot);
+ /* side 0 */
+ base += size & 0xffff;
+ pci_write_config8(north, ramregs[2 * slot], base);
+ /* side 1 */
+ base += size >> 16;
+ if (base > 0xff)
+ base = 0xff;
+ pci_write_config8(north, ramregs[2 * slot + 1], base);
+
+ if (!size)
+ continue;
+
+ /* Read the row densities */
+ size = smbus_read_byte(0x50+slot, 0x1f);
+
+ /* Set the MA map type.
+ *
+ * 0xa should be another option, but when
+ * it would be used is unknown.
+ */
+
+ if (size < 16 ) /* less than 64 MB per side */
+ ma = 0x0;
+ else if (size < 32) /* less than 128MB per side */
+ ma = 0x8;
+ else if ( size < 64) /* less than 256MB per side */
+ ma = 0xc;
+ else /* 256MB or more per side */
+ ma = 0xe;
+ print_debug_hex16(ma);
+ print_debug(" is the MA type\r\n");
+ set_ma_mapping(north, slot, ma);
}
- /*
- base = do_module_size(0xa0, base);
- base = do_module_size(0xa0, base);
- base = do_module_size(0xa0, base);
- base = do_module_size(0xa0, base);
- base = do_module_size(0xa0, base);
- base = do_module_size(0xa0, base);*/
- print_err("vt8601 done\n");
- dumpnorth(north);
- udelay(1000);
+ print_err("vt8601 done\r\n");
}
projects / coreboot.git / blobdiff