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Implement va>tte-data defer word for the MMU TLB miss handlers.

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As used by OpenSolaris. This enables OpenSolaris boot to proceed further by allowing the kernel to correctly manage its own TLB 
misses.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@siriusit.co.uk>


git-svn-id: svn://coreboot.org/openbios/trunk/openbios-devel@886 f158a5a8-5612-0410-a976-696ce0be7e32
This commit is contained in:
Mark Cave-Ayland
2010-10-03 20:28:27 +00:00
committed by Mark Cave-Ayland
parent e1337d80a8
commit 44af623113
2 changed files with 58 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/sparc64/init.fs
View File

@@ -1,3 +1,10 @@
\ va>tte-data defer MMU virtual to physical address hook for Solaris
\ We need to make sure this is in the global wordlist
active-package 0 active-package!
defer va>tte-data
0 to va>tte-data
active-package!
:noname
." Type 'help' for detailed information" cr
\ ." boot secondary slave cdrom: " cr

59
arch/sparc64/lib.c
View File

@@ -16,6 +16,8 @@
#include "ofmem_sparc64.h"
static ucell *va2ttedata = 0;
/* Format a string and print it on the screen, just like the libc
* function printf.
*/
@@ -228,10 +230,28 @@ dtlb_miss_handler(void)
faultva >>= 13;
faultva <<= 13;
/* Search the ofmem linked list for this virtual address */
PUSH(faultva);
pgmap_fetch();
tte_data = POP();
/* If a valid va>tte-data routine has been set, invoke that Forth xt instead */
if (va2ttedata && *va2ttedata != 0) {
/* va>tte-data ( addr cnum -- false | tte-data true ) */
PUSH(faultva);
PUSH(0);
enterforth(*va2ttedata);
/* Check the result first... */
tte_data = POP();
if (!tte_data) {
bug();
} else {
/* Grab the real data */
tte_data = POP();
}
} else {
/* Search the ofmem linked list for this virtual address */
PUSH(faultva);
pgmap_fetch();
tte_data = POP();
}
if (tte_data) {
/* Update MMU */
@@ -240,6 +260,7 @@ dtlb_miss_handler(void)
/* If we got here, there was no translation so fail */
bug();
}
}
static void
@@ -298,10 +319,28 @@ itlb_miss_handler(void)
faultva >>= 13;
faultva <<= 13;
/* Search the ofmem linked list for this virtual address */
PUSH(faultva);
pgmap_fetch();
tte_data = POP();
/* If a valid va>tte-data routine has been set, invoke that Forth xt instead */
if (va2ttedata && *va2ttedata != 0) {
/* va>tte-data ( addr cnum -- false | tte-data true ) */
PUSH(faultva);
PUSH(0);
enterforth(*va2ttedata);
/* Check the result first... */
tte_data = POP();
if (!tte_data) {
bug();
} else {
/* Grab the real data */
tte_data = POP();
}
} else {
/* Search the ofmem linked list for this virtual address */
PUSH(faultva);
pgmap_fetch();
tte_data = POP();
}
if (tte_data) {
/* Update MMU */
@@ -617,4 +656,8 @@ void ob_mmu_init(const char *cpuname, uint64_t ram_size)
PUSH(0);
fword("active-package!");
bind_func("pgmap@", pgmap_fetch);
/* Find address of va2ttedata defer word contents for MMU miss handlers */
va2ttedata = (ucell *)findword("va>tte-data");
va2ttedata++;
}