diff options
Diffstat (limited to 'src/cpu/intel/slot_1/l2_cache.c')
| -rw-r--r-- | src/cpu/intel/slot_1/l2_cache.c | 53 |
1 files changed, 34 insertions, 19 deletions
diff --git a/src/cpu/intel/slot_1/l2_cache.c b/src/cpu/intel/slot_1/l2_cache.c index b7b9719747..05eaeb300b 100644 --- a/src/cpu/intel/slot_1/l2_cache.c +++ b/src/cpu/intel/slot_1/l2_cache.c @@ -169,7 +169,8 @@ int calculate_l2_latency(void) msr = rdmsr(EBL_CR_POWERON); /* Get clock multiplier and FSB frequency. * Multiplier is in [25:22]. - * FSB is in [19:18] in Katmai, [19] in Deschutes ([18] is zero for them). + * FSB is in [19:18] in Katmai, [19] in Deschutes ([18] is zero + * for them). */ eax = msr.lo >> 18; if (signature == 0x650) { @@ -185,7 +186,9 @@ int calculate_l2_latency(void) for (le = latency_table; le->key != eax; le++) { /* Fail if we get to the end of the table */ if (le->key == 0xff) { - printk(BIOS_DEBUG, "Could not find key %02x in latency table\n", eax); + printk(BIOS_DEBUG, + "Could not find key %02x in latency table\n", + eax); return -1; } } @@ -281,7 +284,8 @@ int write_l2(u32 address, u32 data) } else v2 &= 0x7; - /* This write has to be replicated to a number of places. Not sure what. */ + /* This write has to be replicated to a number of places. Not sure what. + */ for (i = 0; i < v2; i++) { @@ -339,7 +343,8 @@ int test_l2_address_alias(u32 address1, u32 address2, /* Calculates the L2 cache size. * * Reference: Intel(R) 64 and IA-32 Architectures Software Developer's Manual - * Volume 3B: System Programming Guide, Part 2, Intel pub. 253669, pg. B-172. + * Volume 3B: System Programming Guide, Part 2, Intel pub. 253669, + * pg. B-172. * */ int calculate_l2_cache_size(void) @@ -357,8 +362,9 @@ int calculate_l2_cache_size(void) bblcr3 = msr.lo & ~BBLCR3_L2_SIZE; /* * Successively write in all the possible cache size per bank - * into BBL_CR_CTL3[17:13], starting from 256KB (00001) to 4MB (10000), - * and read the last value written and accepted by the cache. + * into BBL_CR_CTL3[17:13], starting from 256KB (00001) to 4MB + * (10000), and read the last value written and accepted by the + * cache. * * No idea why these bits are writable at all. */ @@ -386,8 +392,9 @@ int calculate_l2_cache_size(void) printk(BIOS_DEBUG, "Maximum cache mask is %x\n", cache_setting); - /* For now, BBL_CR_CTL3 has the highest cache "size" that register - * will accept. Now we'll ping the cache and see where it wraps. + /* For now, BBL_CR_CTL3 has the highest cache "size" that + * register will accept. Now we'll ping the cache and see where + * it wraps. */ /* Write aaaaaaaa:aaaaaaaa to address 0 in the l2 cache. @@ -493,7 +500,8 @@ int calculate_l2_cache_size(void) return 0; } -// L2 physical address range can be found from L2 control register 3, bits [2:0]. +// L2 physical address range can be found from L2 control register 3, +// bits [2:0]. int calculate_l2_physical_address_range(void) { int r0, r3; @@ -512,7 +520,8 @@ int calculate_l2_physical_address_range(void) else r3 &= 0x7; - printk(BIOS_DEBUG, "L2 Physical Address Range is %dM\n", (1 << r3) * 512); + printk(BIOS_DEBUG, "L2 Physical Address Range is %dM\n", + (1 << r3) * 512); /* Shift into [22:20] to be saved into BBL_CR_CTL3. */ r3 = r3 << 20; @@ -659,8 +668,9 @@ int p6_configure_l2_cache(void) bblctl3.lo = eax; wrmsr(BBL_CR_CTL3, bblctl3); - /* Write BBL_CR_CTL3[27:26] (reserved??) to bits [1:0] of L2 register 4. - * Apparently all other bits must be preserved, hence these code. + /* Write BBL_CR_CTL3[27:26] (reserved??) to bits [1:0] of L2 + * register 4. Apparently all other bits must be preserved, + * hence these code. */ v = (calc_eax >> 26) & 0x3; @@ -685,7 +695,8 @@ int p6_configure_l2_cache(void) /* Read L2 register 0 */ v = read_l2(0); - /* If L2(0)[5] set (and can be read properly), enable CRTN and address parity + /* If L2(0)[5] set (and can be read properly), enable CRTN and address + * parity */ if (v >= 0 && (v & 0x20)) { bblctl3 = rdmsr(BBL_CR_CTL3); @@ -700,7 +711,8 @@ int p6_configure_l2_cache(void) set_l2_ecc(); if (calculate_l2_physical_address_range() != 0) { - printk(BIOS_ERR, "Failed to calculate L2 physical address range"); + printk(BIOS_ERR, + "Failed to calculate L2 physical address range"); goto bad; } @@ -738,9 +750,10 @@ int p6_configure_l2_cache(void) /* Update each way */ - /* We're supposed to get L2 associativity from BBL_CR_CTL3[10:9]. - * But this code only applies to certain members of the P6 processor family - * and since all P6 processors have 4-way L2 cache, we can safely assume + /* We're supposed to get L2 associativity from + * BBL_CR_CTL3[10:9]. But this code only applies to certain + * members of the P6 processor family and since all P6 + * processors have 4-way L2 cache, we can safely assume * 4 way for all cache operations. */ @@ -748,8 +761,10 @@ int p6_configure_l2_cache(void) /* Send Tag Write w/Data Write (TWW) to L2 controller * MESI = Invalid */ - if (signal_l2(cache_size, 0, 0, v, L2CMD_TWW | L2CMD_MESI_I) != 0) { - printk(BIOS_ERR, "Failed on signal_l2(%x, %x)\n", + if (signal_l2(cache_size, 0, 0, v, L2CMD_TWW + | L2CMD_MESI_I) != 0) { + printk(BIOS_ERR, + "Failed on signal_l2(%x, %x)\n", cache_size, v); goto bad; } |