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Diffstat (limited to 'src/cpu/x86/mtrr/mtrr.c')
-rw-r--r--src/cpu/x86/mtrr/mtrr.c132
1 files changed, 79 insertions, 53 deletions
diff --git a/src/cpu/x86/mtrr/mtrr.c b/src/cpu/x86/mtrr/mtrr.c
index 59f9ca1e91..1226713cf5 100644
--- a/src/cpu/x86/mtrr/mtrr.c
+++ b/src/cpu/x86/mtrr/mtrr.c
@@ -22,9 +22,14 @@
*
* Reference: Intel Architecture Software Developer's Manual, Volume 3: System Programming
*/
+
/*
- 2005.1 yhlu add NC support to spare mtrrs for 64G memory stored
+ 2005.1 yhlu add NC support to spare mtrrs for 64G memory above installed
+ 2005.6 Eric add address bit in x86_setup_mtrrs
+ 2005.6 yhlu split x86_setup_var_mtrrs and x86_setup_fixed_mtrrs,
+ for AMD, it will not use x86_setup_fixed_mtrrs
*/
+
#include <stddef.h>
#include <console/console.h>
#include <device/device.h>
@@ -32,19 +37,6 @@
#include <cpu/x86/mtrr.h>
#include <cpu/x86/cache.h>
-#warning "FIXME I do not properly handle address more than 36 physical address bits"
-
-//#define k8 0
-#define k8 1
-
-#if k8
-# define ADDRESS_BITS 40
-#else
-# define ADDRESS_BITS 36
-#endif
-#define ADDRESS_BITS_HIGH (ADDRESS_BITS - 32)
-#define ADDRESS_MASK_HIGH ((1u << ADDRESS_BITS_HIGH) - 1)
-
static unsigned int mtrr_msr[] = {
MTRRfix64K_00000_MSR, MTRRfix16K_80000_MSR, MTRRfix16K_A0000_MSR,
MTRRfix4K_C0000_MSR, MTRRfix4K_C8000_MSR, MTRRfix4K_D0000_MSR, MTRRfix4K_D8000_MSR,
@@ -52,7 +44,7 @@ static unsigned int mtrr_msr[] = {
};
-static void enable_fixed_mtrr(void)
+void enable_fixed_mtrr(void)
{
msr_t msr;
@@ -71,21 +63,26 @@ static void enable_var_mtrr(void)
}
/* setting variable mtrr, comes from linux kernel source */
-static void set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek, unsigned char type)
+static void set_var_mtrr(
+ unsigned int reg, unsigned long basek, unsigned long sizek,
+ unsigned char type, unsigned address_bits)
{
msr_t base, mask;
+ unsigned address_mask_high;
+
+ address_mask_high = ((1u << (address_bits - 32u)) - 1u);
base.hi = basek >> 22;
base.lo = basek << 10;
- //printk_debug("ADDRESS_MASK_HIGH=%#x\n", ADDRESS_MASK_HIGH);
+ printk_spew("ADDRESS_MASK_HIGH=%#x\n", address_mask_high);
if (sizek < 4*1024*1024) {
- mask.hi = ADDRESS_MASK_HIGH;
+ mask.hi = address_mask_high;
mask.lo = ~((sizek << 10) -1);
}
else {
- mask.hi = ADDRESS_MASK_HIGH & (~((sizek >> 22) -1));
+ mask.hi = address_mask_high & (~((sizek >> 22) -1));
mask.lo = 0;
}
@@ -219,7 +216,7 @@ 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 long next_range_startk, unsigned char type, unsigned address_bits)
{
if (!range_sizek || (reg >= BIOS_MTRRS)) {
return reg;
@@ -235,11 +232,11 @@ static unsigned int range_to_mtrr(unsigned int reg,
}
sizek = 1 << align;
printk_debug("Setting variable MTRR %d, base: %4dMB, range: %4dMB, type %s\n",
- reg, range_startk >>10, sizek >> 10,
- (type==MTRR_TYPE_UNCACHEABLE) ? "NC" :
- ((type==MTRR_TYPE_WRBACK) ? "WB" : "Other")
+ reg, range_startk >>10, sizek >> 10,
+ (type==MTRR_TYPE_UNCACHEABLE)?"UC":
+ ((type==MTRR_TYPE_WRBACK)?"WB":"Other")
);
- set_var_mtrr(reg++, range_startk, sizek, type);
+ set_var_mtrr(reg++, range_startk, sizek, type, address_bits);
range_startk += sizek;
range_sizek -= sizek;
if (reg >= BIOS_MTRRS)
@@ -279,6 +276,7 @@ struct var_mtrr_state {
unsigned long range_startk, range_sizek;
unsigned int reg;
unsigned long hole_startk, hole_sizek;
+ unsigned address_bits;
};
void set_var_mtrr_resource(void *gp, struct device *dev, struct resource *res)
@@ -300,47 +298,68 @@ void set_var_mtrr_resource(void *gp, struct device *dev, struct resource *res)
}
/* Write the range mtrrs */
if (state->range_sizek != 0) {
- if(state->hole_sizek == 0) {
- // we need to put that on to hole.
- unsigned long endk = basek + sizek;
+ if (state->hole_sizek == 0) {
+ /* We need to put that on to hole */
+ unsigned long endk = basek + sizek;
state->hole_startk = state->range_startk + state->range_sizek;
- state->hole_sizek = basek - state->hole_startk;
- state->range_sizek = endk - state->range_startk;
+ state->hole_sizek = basek - state->hole_startk;
+ state->range_sizek = endk - state->range_startk;
return;
}
- state->reg = range_to_mtrr(state->reg, state->range_startk, state->range_sizek, basek, MTRR_TYPE_WRBACK);
- state->reg = range_to_mtrr(state->reg, state->hole_startk, state->hole_sizek, basek, MTRR_TYPE_UNCACHEABLE);
+ state->reg = range_to_mtrr(state->reg, state->range_startk,
+ state->range_sizek, basek, MTRR_TYPE_WRBACK, state->address_bits);
+ state->reg = range_to_mtrr(state->reg, state->hole_startk,
+ state->hole_sizek, basek, MTRR_TYPE_UNCACHEABLE, state->address_bits);
state->range_startk = 0;
state->range_sizek = 0;
state->hole_startk = 0;
state->hole_sizek = 0;
}
- /* Allocate an msr */
+ /* Allocate an msr */
+ printk_spew(" Allocate an msr - basek = %d, sizek = %d,\n", basek, sizek);
state->range_startk = basek;
state->range_sizek = sizek;
}
-void x86_setup_mtrrs(void)
+void x86_setup_fixed_mtrrs(void)
+{
+ /* Try this the simple way of incrementally adding together
+ * mtrrs. If this doesn't work out we can get smart again
+ * and clear out the mtrrs.
+ */
+ struct var_mtrr_state var_state;
+
+ printk_debug("\n");
+ /* Initialized the fixed_mtrrs to uncached */
+ printk_debug("Setting fixed MTRRs(%d-%d) type: UC\n",
+ 0, NUM_FIXED_RANGES);
+ set_fixed_mtrrs(0, NUM_FIXED_RANGES, MTRR_TYPE_UNCACHEABLE);
+
+ /* Now see which of the fixed mtrrs cover ram.
+ */
+ search_global_resources(
+ IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
+ set_fixed_mtrr_resource, NULL);
+ printk_debug("DONE fixed MTRRs\n");
+
+ /* enable fixed MTRR */
+ printk_spew("call enable_fixed_mtrr()\n");
+ enable_fixed_mtrr();
+
+}
+void x86_setup_var_mtrrs(unsigned address_bits)
+/* 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.
+ */
{
/* Try this the simple way of incrementally adding together
* mtrrs. If this doesn't work out we can get smart again
* and clear out the mtrrs.
*/
struct var_mtrr_state var_state;
-#if !k8
- printk_debug("\n");
- /* Initialized the fixed_mtrrs to uncached */
- printk_debug("Setting fixed MTRRs(%d-%d) type: UC\n",
- 0, NUM_FIXED_RANGES);
- set_fixed_mtrrs(0, NUM_FIXED_RANGES, MTRR_TYPE_UNCACHEABLE);
-
- /* Now see which of the fixed mtrrs cover ram.
- */
- search_global_resources(
- IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
- set_fixed_mtrr_resource, NULL);
- printk_debug("DONE fixed MTRRs\n");
-#endif
/* Cache as many memory areas as possible */
/* FIXME is there an algorithm for computing the optimal set of mtrrs?
@@ -351,28 +370,35 @@ void x86_setup_mtrrs(void)
var_state.hole_startk = 0;
var_state.hole_sizek = 0;
var_state.reg = 0;
+ var_state.address_bits = address_bits;
search_global_resources(
IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
set_var_mtrr_resource, &var_state);
/* 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.reg = range_to_mtrr(var_state.reg, var_state.hole_startk, var_state.hole_sizek, 0, MTRR_TYPE_UNCACHEABLE);
+ 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.reg = range_to_mtrr(var_state.reg, var_state.hole_startk,
+ var_state.hole_sizek, 0, MTRR_TYPE_UNCACHEABLE, var_state.address_bits);
printk_debug("DONE variable MTRRs\n");
printk_debug("Clear out the extra MTRR's\n");
/* Clear out the extra MTRR's */
while(var_state.reg < MTRRS) {
- set_var_mtrr(var_state.reg++, 0, 0, 0);
+ set_var_mtrr(var_state.reg++, 0, 0, 0, var_state.address_bits);
}
- /* enable fixed MTRR */
- printk_spew("call enable_fixed_mtrr()\n");
- enable_fixed_mtrr();
printk_spew("call enable_var_mtrr()\n");
enable_var_mtrr();
printk_spew("Leave %s\n", __FUNCTION__);
post_code(0x6A);
}
+void x86_setup_mtrrs(unsigned address_bits)
+{
+ x86_setup_fixed_mtrrs();
+ x86_setup_var_mtrrs(address_bits);
+}
+
+
int x86_mtrr_check(void)
{
/* Only Pentium Pro and later have MTRR */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 13:23:10 +0000