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MTRR related improvements for AMD family 10h and family 0Fh systems 

-- When building for UMA, reduce the limit for DRAM below 4GB
   from E0000000 to C0000000. This is needed to accomodate the
   UMA frame buffer.
-- Correct problem where msr C0010010 bits 21 and 22 (MtrrTom2En
   and Tom2ForceMemTypeWB) are not set consistently across cores.
-- Enable TOM2 only if DRAM is present above 4GB.
-- Use AMD Tom2ForceMemTypeWB feature to avoid the need for 
   variable MTRR ranges above 4GB.
-- Add above4gb flag argument to function x86_setup_var_mtrrs. Clearing
   this flag causes x86_setup_var_mtrrs() to omit MTRR ranges for
   DRAM above 4GB. AMD systems use this option to conserve MTRRs.
-- Northbridge.c change to deduct UMA memory from DRAM size reported
   by ram_resource. This corrects a problem where mtrr.c generates an
   unexpected variable MTRR range.
-- Correct problem causing build failure when CONFIG_GFXUMA=1 and
   CONFIG_VAR_MTRR_HOLE=0.
-- Reserve the UMA DRAM range for AMD K8 as is already done for AMD
   family 10h.
Tested with mahogany on ECS A780G-GM with 2GB and 4GB.
Tested with mahogany_fam10 on ECS A780G-GM with 2GB and 4GB.
 
Signed-off-by: Scott Duplichan <scott@notabs.org>
Acked-by: Peter Stuge <peter@stuge.se>

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6067 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Scott Duplichan 2010-11-13 19:07:59 +00:00
parent 5960fb3dbd
commit f3cce2f3c4
8 changed files with 101 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/cpu/amd/mtrr/amd_mtrr.c
View File

@ -6,6 +6,10 @@
#include <cpu/x86/cache.h>
#include <cpu/x86/msr.h>
#if CONFIG_GFXUMA == 1
extern uint64_t uma_memory_size;
#endif
static unsigned long resk(uint64_t value)
{
unsigned long resultk;
@ -107,14 +111,14 @@ void amd_setup_mtrrs(void)
unsigned long address_bits;
struct mem_state state;
unsigned long i;
msr_t msr;
msr_t msr, sys_cfg;
/* Enable the access to AMD RdDram and WrDram extension bits */
disable_cache();
msr = rdmsr(SYSCFG_MSR);
msr.lo |= SYSCFG_MSR_MtrrFixDramModEn;
wrmsr(SYSCFG_MSR, msr);
sys_cfg = rdmsr(SYSCFG_MSR);
sys_cfg.lo |= SYSCFG_MSR_MtrrFixDramModEn;
wrmsr(SYSCFG_MSR, sys_cfg);
enable_cache();
printk(BIOS_DEBUG, "\n");
@ -146,13 +150,25 @@ void amd_setup_mtrrs(void)
/* Setup TOP_MEM */
msr.hi = state.mmio_basek >> 22;
msr.lo = state.mmio_basek << 10;
/* If UMA graphics is enabled, the frame buffer memory
* has been deducted from the size of memory below 4GB.
* When setting TOM, include UMA DRAM
*/
#if CONFIG_GFXUMA == 1
msr.lo += uma_memory_size;
#endif
wrmsr(TOP_MEM, msr);
sys_cfg.lo &= ~(SYSCFG_MSR_TOM2En | SYSCFG_MSR_TOM2WB);
if(state.tomk > (4*1024*1024)) {
/* Setup TOP_MEM2 */
/* DRAM above 4GB: set TOM2, SYSCFG_MSR_TOM2En
* and SYSCFG_MSR_TOM2WB
*/
msr.hi = state.tomk >> 22;
msr.lo = state.tomk << 10;
wrmsr(TOP_MEM2, msr);
sys_cfg.lo |= SYSCFG_MSR_TOM2En | SYSCFG_MSR_TOM2WB;
}
/* zero the IORR's before we enable to prevent
@ -167,10 +183,9 @@ void amd_setup_mtrrs(void)
* Enable the RdMem and WrMem bits in the fixed mtrrs.
* Disable access to the RdMem and WrMem in the fixed mtrr.
*/
msr = rdmsr(SYSCFG_MSR);
msr.lo |= SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_TOM2En;
msr.lo &= ~SYSCFG_MSR_MtrrFixDramModEn;
wrmsr(SYSCFG_MSR, msr);
sys_cfg.lo |= SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn;
sys_cfg.lo &= ~SYSCFG_MSR_MtrrFixDramModEn;
wrmsr(SYSCFG_MSR, sys_cfg);
enable_fixed_mtrr();
@ -186,5 +201,5 @@ void amd_setup_mtrrs(void)
/* Now that I have mapped what is memory and what is not
* Setup the mtrrs so we can cache the memory.
*/
x86_setup_var_mtrrs(address_bits);
x86_setup_var_mtrrs(address_bits, 0);
}

43
src/cpu/x86/mtrr/mtrr.c
View File

@ -230,7 +230,8 @@ static unsigned fixed_mtrr_index(unsigned long addrk)
static unsigned int range_to_mtrr(unsigned int reg,
unsigned long range_startk, unsigned long range_sizek,
unsigned long next_range_startk, unsigned char type, unsigned address_bits)
unsigned long next_range_startk, unsigned char type,
unsigned int address_bits, unsigned int above4gb)
{
if (!range_sizek) {
/* If there's no MTRR hole, this function will bail out
@ -263,6 +264,11 @@ static unsigned int range_to_mtrr(unsigned int reg,
(type==MTRR_TYPE_UNCACHEABLE)?"UC":
((type==MTRR_TYPE_WRBACK)?"WB":"Other")
);
/* if range is above 4GB, MTRR is needed
* only if above4gb flag is set
*/
if (range_startk < 0x100000000ull / 1024 || above4gb)
set_var_mtrr(reg++, range_startk, sizek, type, address_bits);
range_startk += sizek;
range_sizek -= sizek;
@ -308,10 +314,9 @@ static void set_fixed_mtrr_resource(void *gp, struct device *dev, struct resourc
struct var_mtrr_state {
unsigned long range_startk, range_sizek;
unsigned int reg;
#if CONFIG_VAR_MTRR_HOLE
unsigned long hole_startk, hole_sizek;
#endif
unsigned address_bits;
unsigned int address_bits;
unsigned int above4gb; /* Set if MTRRs are needed for DRAM above 4GB */
};
void set_var_mtrr_resource(void *gp, struct device *dev, struct resource *res)
@ -344,17 +349,17 @@ void set_var_mtrr_resource(void *gp, struct device *dev, struct resource *res)
}
#endif
state->reg = range_to_mtrr(state->reg, state->range_startk,
state->range_sizek, basek, MTRR_TYPE_WRBACK, state->address_bits);
state->range_sizek, basek, MTRR_TYPE_WRBACK,
state->address_bits, state->above4gb);
#if CONFIG_VAR_MTRR_HOLE
state->reg = range_to_mtrr(state->reg, state->hole_startk,
state->hole_sizek, basek, MTRR_TYPE_UNCACHEABLE, state->address_bits);
state->hole_sizek, basek, MTRR_TYPE_UNCACHEABLE,
state->address_bits, state->above4gb);
#endif
state->range_startk = 0;
state->range_sizek = 0;
#if CONFIG_VAR_MTRR_HOLE
state->hole_startk = 0;
state->hole_sizek = 0;
#endif
}
/* Allocate an msr */
printk(BIOS_SPEW, " Allocate an msr - basek = %08lx, sizek = %08lx,\n", basek, sizek);
@ -388,12 +393,15 @@ void x86_setup_fixed_mtrrs(void)
}
void x86_setup_var_mtrrs(unsigned address_bits)
void x86_setup_var_mtrrs(unsigned int address_bits, unsigned int above4gb)
/* this routine needs to know how many address bits a given processor
* supports. CPUs get grumpy when you set too many bits in
* their mtrr registers :( I would generically call cpuid here
* and find out how many physically supported but some cpus are
* buggy, and report more bits then they actually support.
* If above4gb flag is set, variable MTRR ranges must be used to
* set cacheability of DRAM above 4GB. If above4gb flag is clear,
* some other mechanism is controlling cacheability of DRAM above 4GB.
*/
{
/* Try this the simple way of incrementally adding together
@ -408,34 +416,38 @@ void x86_setup_var_mtrrs(unsigned address_bits)
*/
var_state.range_startk = 0;
var_state.range_sizek = 0;
#if CONFIG_VAR_MTRR_HOLE
var_state.hole_startk = 0;
var_state.hole_sizek = 0;
#endif
var_state.reg = 0;
var_state.address_bits = address_bits;
var_state.above4gb = above4gb;
search_global_resources(
IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
set_var_mtrr_resource, &var_state);
#if (CONFIG_GFXUMA == 1) /* UMA or SP. */
// For now we assume the UMA space is at the end of memory
/* For now we assume the UMA space is at the end of memory below 4GB */
if (var_state.hole_startk || var_state.hole_sizek) {
printk(BIOS_DEBUG, "Warning: Can't set up MTRR hole for UMA due to pre-existing MTRR hole.\n");
} else {
#if CONFIG_VAR_MTRR_HOLE
// Increase the base range and set up UMA as an UC hole instead
var_state.range_sizek += (uma_memory_size >> 10);
var_state.hole_startk = (uma_memory_base >> 10);
var_state.hole_sizek = (uma_memory_size >> 10);
#endif
}
#endif
/* Write the last range */
var_state.reg = range_to_mtrr(var_state.reg, var_state.range_startk,
var_state.range_sizek, 0, MTRR_TYPE_WRBACK, var_state.address_bits);
var_state.range_sizek, 0, MTRR_TYPE_WRBACK,
var_state.address_bits, var_state.above4gb);
#if CONFIG_VAR_MTRR_HOLE
var_state.reg = range_to_mtrr(var_state.reg, var_state.hole_startk,
var_state.hole_sizek, 0, MTRR_TYPE_UNCACHEABLE, var_state.address_bits);
var_state.hole_sizek, 0, MTRR_TYPE_UNCACHEABLE,
var_state.address_bits, var_state.above4gb);
#endif
printk(BIOS_DEBUG, "DONE variable MTRRs\n");
printk(BIOS_DEBUG, "Clear out the extra MTRR's\n");
@ -449,10 +461,11 @@ void x86_setup_var_mtrrs(unsigned address_bits)
post_code(0x6A);
}
void x86_setup_mtrrs(unsigned address_bits)
{
x86_setup_fixed_mtrrs();
x86_setup_var_mtrrs(address_bits);
x86_setup_var_mtrrs(address_bits, 1);
}

1
src/include/cpu/amd/mtrr.h
View File

@ -8,6 +8,7 @@
#define MTRR_WRITE_MEM (1 << 3)
#define SYSCFG_MSR 0xC0010010
#define SYSCFG_MSR_TOM2WB (1 << 22)
#define SYSCFG_MSR_TOM2En (1 << 21)
#define SYSCFG_MSR_MtrrVarDramEn (1 << 20)
#define SYSCFG_MSR_MtrrFixDramModEn (1 << 19)

2
src/include/cpu/x86/mtrr.h
View File

@ -37,7 +37,7 @@
#if !defined (ASSEMBLY) && !defined(__PRE_RAM__)
#include <device/device.h>
void enable_fixed_mtrr(void);
void x86_setup_var_mtrrs(unsigned address_bits);
void x86_setup_var_mtrrs(unsigned int address_bits, unsigned int above4gb);
void x86_setup_mtrrs(unsigned address_bits);
int x86_mtrr_check(void);
void set_var_mtrr_resource(void *gp, struct device *dev, struct resource *res);

6
src/northbridge/amd/amdfam10/northbridge.c
View File

@ -1060,6 +1060,12 @@ static void amdfam10_domain_set_resources(device_t dev)
sizek -= (4*1024*1024 - mmio_basek);
}
}
#if CONFIG_GFXUMA == 1
/* Deduct uma memory before reporting because
* this is what the mtrr code expects */
sizek -= uma_memory_size / 1024;
#endif
ram_resource(dev, (idx | i), basek, sizek);
idx += 0x10;
#if CONFIG_WRITE_HIGH_TABLES==1

26
src/northbridge/amd/amdk8/northbridge.c
View File

@ -822,11 +822,24 @@ static u32 hoist_memory(unsigned long hole_startk, int node_id)
#endif
#if CONFIG_WRITE_HIGH_TABLES==1
#define HIGH_TABLES_SIZE 64 // maximum size of high tables in KB
#define HIGH_TABLES_SIZE 64 /* maximum size of high tables in KB */
extern uint64_t high_tables_base, high_tables_size;
#endif
#if CONFIG_GFXUMA == 1
extern uint64_t uma_memory_base, uma_memory_size;
#endif
static void add_uma_resource(struct device *dev, int index)
{
struct resource *resource;
printk(BIOS_DEBUG, "Adding UMA memory area\n");
resource = new_resource(dev, index);
resource->base = (resource_t) uma_memory_base;
resource->size = (resource_t) uma_memory_size;
resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
}
#endif
static void amdk8_domain_set_resources(device_t dev)
@ -1040,6 +1053,11 @@ static void amdk8_domain_set_resources(device_t dev)
/* If sizek == 0, it was split at mmio_basek without a hole.
* Don't create an empty ram_resource.
*/
#if CONFIG_GFXUMA == 1
/* Deduct uma memory before reporting because
* this is what the mtrr code expects */
sizek -= uma_memory_size / 1024;
#endif
if (sizek)
ram_resource(dev, (idx | i), basek, sizek);
idx += 0x10;
@ -1057,6 +1075,10 @@ static void amdk8_domain_set_resources(device_t dev)
}
#endif
}
#if CONFIG_GFXUMA == 1
add_uma_resource(dev, 7);
#endif
assign_resources(dev->link_list);
}

6
src/northbridge/amd/amdmct/wrappers/mcti.h
View File

@ -42,12 +42,6 @@ COMMENT OUT ALL BUT 1
//#define SYSTEM_TYPE MOBILE
#endif
/*----------------------------------------------------------------------------
COMMENT OUT ALL BUT 1
----------------------------------------------------------------------------*/
#define UMA_SUPPORT 0 /*Not supported */
//#define UMA_SUPPORT 1 /*Supported */
/*----------------------------------------------------------------------------
UPDATE AS NEEDED
----------------------------------------------------------------------------*/

22
src/northbridge/amd/amdmct/wrappers/mcti_d.c
View File

@ -64,16 +64,16 @@ static u16 mctGet_NVbits(u8 index)
//val = 2; /* S4 (Unbuffered SO-DIMMS) */
break;
case NV_BYPMAX:
#if (UMA_SUPPORT == 0)
#if (CONFIG_GFXUMA == 0)
val = 4;
#elif (UMA_SUPPORT == 1)
#elif (CONFIG_GFXUMA == 1)
val = 7;
#endif
break;
case NV_RDWRQBYP:
#if (UMA_SUPPORT == 0)
#if (CONFIG_GFXUMA == 0)
val = 2;
#elif (UMA_SUPPORT == 1)
#elif (CONFIG_GFXUMA == 1)
val = 3;
#endif
break;
@ -113,9 +113,9 @@ static u16 mctGet_NVbits(u8 index)
//val = 1; /* Enable */
break;
case NV_BurstLen32:
#if (UMA_SUPPORT == 0)
#if (CONFIG_GFXUMA == 0)
val = 0; /* 64 byte mode */
#elif (UMA_SUPPORT == 1)
#elif (CONFIG_GFXUMA == 1)
val = 1; /* 32 byte mode */
#endif
break;
@ -132,13 +132,17 @@ static u16 mctGet_NVbits(u8 index)
//val = 1; /* enable */
break;
case NV_BottomIO:
#if (CONFIG_GFXUMA == 0)
val = 0xE0; /* address bits [31:24] */
#elif (CONFIG_GFXUMA == 1)
val = 0xC0; /* address bits [31:24] */
#endif
break;
case NV_BottomUMA:
#if (UMA_SUPPORT == 0)
#if (CONFIG_GFXUMA == 0)
val = 0xE0; /* address bits [31:24] */
#elif (UMA_SUPPORT == 1)
val = 0xB0; /* address bits [31:24] */
#elif (CONFIG_GFXUMA == 1)
val = 0xC0; /* address bits [31:24] */
#endif
break;
case NV_ECC: