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Check the real-mode? OF property to find out whether we operate in real or

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virtual mode. In virtual mode we have to do memory mapping. On PowerMacs it is
usually false while on pSeries we have found that it is true. The real-mode?
property is not available on sparc64.

Approved by: 	nwhitehorn (mentor)
This commit is contained in:
Andreas Tobler 2010-11-17 19:35:56 +00:00
parent cb1b50fa7c
commit da068879c5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=215438
3 changed files with 28 additions and 9 deletions
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24
sys/boot/ofw/libofw/ofw_copy.c
View File

@ -91,16 +91,22 @@ ofw_mapmem(vm_offset_t dest, const size_t len)
return (ENOMEM);
}
if (OF_call_method("claim", mmu, 3, 1, destp, dlen, 0, &addr) == -1) {
printf("ofw_mapmem: virtual claim failed\n");
return (ENOMEM);
}
if (OF_call_method("map", mmu, 4, 0, destp, destp, dlen, 0) == -1) {
printf("ofw_mapmem: map failed\n");
return (ENOMEM);
}
/*
* We only do virtual memory management when real_mode is false.
*/
if (real_mode == 0) {
if (OF_call_method("claim", mmu, 3, 1, destp, dlen, 0, &addr)
== -1) {
printf("ofw_mapmem: virtual claim failed\n");
return (ENOMEM);
}
if (OF_call_method("map", mmu, 4, 0, destp, destp, dlen, 0)
== -1) {
printf("ofw_mapmem: map failed\n");
return (ENOMEM);
}
}
last_dest = (vm_offset_t) destp;
last_len = dlen;

12
sys/boot/ofw/libofw/openfirm.c
View File

@ -69,12 +69,15 @@ int (*openfirmware)(void *);
phandle_t chosen;
ihandle_t mmu;
ihandle_t memory;
int real_mode = 0;
/* Initialiser */
void
OF_init(int (*openfirm)(void *))
{
phandle_t options;
char mode[8];
openfirmware = openfirm;
@ -89,6 +92,15 @@ OF_init(int (*openfirm)(void *))
}
if (OF_getprop(chosen, "mmu", &mmu, sizeof(mmu)) == -1)
OF_exit();
/*
* Check if we run in real mode. If so, we do not need to map
* memory later on.
*/
options = OF_finddevice("/options");
OF_getprop(options, "real-mode?", mode, sizeof(mode));
if (strncmp(mode, "true", 4) == 0)
real_mode = 1;
}
/*

1
sys/boot/ofw/libofw/openfirm.h
View File

@ -72,6 +72,7 @@ typedef unsigned long int cell_t;
extern int (*openfirmware)(void *);
extern phandle_t chosen;
extern ihandle_t memory, mmu;
extern int real_mode;
/*
* This isn't actually an Open Firmware function, but it seemed like the right