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- To reduce confuse rename the parts of linuxbios bios that run from

Browse Source 
ram linuxbios_ram instead of linuxbios_c and linuxbios_payload...
- Reordered the linker sections so the LinuxBIOS fallback image can take more the 64KiB on x86
- ROM_IMAGE_SIZE now will work when it is specified as larger than 64KiB.
- Tweaked the reset16.inc and reset16.lds to move the sanity check to see if everything will work.
- Start using romcc's built in preprocessor (This will simplify header compiler checks)
- Add helper functions for examining all of the resources
- Remove debug strings from chip.h
- Add llshell to src/arch/i386/llshell (Sometime later I can try it...)
- Add the ability to catch exceptions on x86
- Add gdb_stub support to x86
- Removed old cpu options
- Added an option so we can detect movnti support
- Remove some duplicate definitions from pci_ids.h
- Remove the 64bit resource code in amdk8/northbridge.c in preparation for making it generic
- Minor romcc bug fixes


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1727 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2004-10-30 08:05:41 +00:00
parent 0afcba7a3d
commit f8a2dddb57
40 changed files with 1451 additions and 400 deletions
Download Patch File Download Diff File Expand all files Collapse all files

126
src/cpu/x86/mtrr/mtrr.c
View File

@@ -23,6 +23,7 @@
* Reference: Intel Architecture Software Developer's Manual, Volume 3: System Programming
*/
#include <stddef.h>
#include <console/console.h>
#include <device/device.h>
#include <cpu/x86/msr.h>
@@ -250,15 +251,61 @@ static unsigned long resk(uint64_t value)
return resultk;
}
static void set_fixed_mtrr_resource(void *gp, struct device *dev, struct resource *res)
{
unsigned int start_mtrr;
unsigned int last_mtrr;
start_mtrr = fixed_mtrr_index(resk(res->base));
last_mtrr = fixed_mtrr_index(resk((res->base + res->size)));
if (start_mtrr >= NUM_FIXED_RANGES) {
return;
}
printk_debug("Setting fixed MTRRs(%d-%d) Type: WB\n",
start_mtrr, last_mtrr);
set_fixed_mtrrs(start_mtrr, last_mtrr, MTRR_TYPE_WRBACK);
}
struct var_mtrr_state {
unsigned long range_startk, range_sizek;
unsigned int reg;
};
void set_var_mtrr_resource(void *gp, struct device *dev, struct resource *res)
{
struct var_mtrr_state *state = gp;
unsigned long basek, sizek;
if (state->reg >= BIOS_MTRRS)
return;
basek = resk(res->base);
sizek = resk(res->size);
/* See if I can merge with the last range
* Either I am below 1M and the fixed mtrrs handle it, or
* the ranges touch.
*/
if ((basek <= 1024) || (state->range_startk + state->range_sizek == basek)) {
unsigned long endk = basek + sizek;
state->range_sizek = endk - state->range_startk;
return;
}
/* Write the range mtrrs */
if (state->range_sizek != 0) {
state->reg = range_to_mtrr(state->reg, state->range_startk, state->range_sizek, basek);
state->range_startk = 0;
state->range_sizek = 0;
}
/* Allocate an msr */
state->range_startk = basek;
state->range_sizek = sizek;
}
void x86_setup_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 device *dev;
unsigned long range_startk, range_sizek;
unsigned int reg;
struct var_mtrr_state var_state;
printk_debug("\n");
/* Initialized the fixed_mtrrs to uncached */
@@ -268,76 +315,29 @@ void x86_setup_mtrrs(void)
/* Now see which of the fixed mtrrs cover ram.
*/
for(dev = all_devices; dev; dev = dev->next) {
struct resource *res, *last;
last = &dev->resource[dev->resources];
for(res = &dev->resource[0]; res < last; res++) {
unsigned int start_mtrr;
unsigned int last_mtrr;
if (!(res->flags & IORESOURCE_MEM) ||
!(res->flags & IORESOURCE_CACHEABLE))
{
continue;
}
start_mtrr = fixed_mtrr_index(resk(res->base));
last_mtrr = fixed_mtrr_index(resk((res->base + res->size)));
if (start_mtrr >= NUM_FIXED_RANGES) {
continue;
}
printk_debug("Setting fixed MTRRs(%d-%d) Type: WB\n",
start_mtrr, last_mtrr);
set_fixed_mtrrs(start_mtrr, last_mtrr, MTRR_TYPE_WRBACK);
}
}
search_global_resources(
IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
set_fixed_mtrr_resource, NULL);
printk_debug("DONE fixed MTRRs\n");
/* Cache as many memory areas as possible */
/* FIXME is there an algorithm for computing the optimal set of mtrrs?
* In some cases it is definitely possible to do better.
*/
range_startk = 0;
range_sizek = 0;
reg = 0;
for(dev = all_devices; dev; dev = dev->next) {
struct resource *res, *last;
last = &dev->resource[dev->resources];
for(res = &dev->resource[0]; res < last; res++) {
unsigned long basek, sizek;
if (!(res->flags & IORESOURCE_MEM) ||
!(res->flags & IORESOURCE_CACHEABLE)) {
continue;
}
basek = resk(res->base);
sizek = resk(res->size);
/* See if I can merge with the last range
* Either I am below 1M and the fixed mtrrs handle it, or
* the ranges touch.
*/
if ((basek <= 1024) || (range_startk + range_sizek == basek)) {
unsigned long endk = basek + sizek;
range_sizek = endk - range_startk;
continue;
}
/* Write the range mtrrs */
if (range_sizek != 0) {
reg = range_to_mtrr(reg, range_startk, range_sizek, basek);
range_startk = 0;
range_sizek = 0;
if (reg >= BIOS_MTRRS)
goto last_msr;
}
/* Allocate an msr */
range_startk = basek;
range_sizek = sizek;
}
}
var_state.range_startk = 0;
var_state.range_sizek = 0;
var_state.reg = 0;
search_global_resources(
IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE,
set_var_mtrr_resource, &var_state);
last_msr:
/* Write the last range */
reg = range_to_mtrr(reg, range_startk, range_sizek, 0);
var_state.reg = range_to_mtrr(var_state.reg, var_state.range_startk, var_state.range_sizek, 0);
printk_debug("DONE variable MTRRs\n");
printk_debug("Clear out the extra MTRR's\n");
/* Clear out the extra MTRR's */
while(reg < MTRRS) {
set_var_mtrr(reg++, 0, 0, 0);
while(var_state.reg < MTRRS) {
set_var_mtrr(var_state.reg++, 0, 0, 0);
}
/* enable fixed MTRR */
printk_spew("call enable_fixed_mtrr()\n");