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Consolidate Apple firmware hacks and improve them by switching on the

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presence of mac-io devices in the tree, which uniquely identifies Apple
hardware.

MFC after:	6 weeks
This commit is contained in:
Nathan Whitehorn 2013-11-11 15:00:33 +00:00
parent 00a689c438
commit bcb6fb8b55
1 changed files with 14 additions and 9 deletions
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23
sys/powerpc/ofw/ofw_machdep.c
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@ -67,6 +67,7 @@ extern register_t ofmsr[5];
extern void *openfirmware_entry;
static void *fdt;
int ofw_real_mode;
static int apple_hacks;
int ofwcall(void *);
static int openfirmware(void *args);
@ -79,6 +80,9 @@ register_t ofw_sprg0_save;
static __inline void
ofw_sprg_prepare(void)
{
if (!apple_hacks)
return;
/*
* Assume that interrupt are disabled at this point, or
* SPRG1-3 could be trashed
@ -98,6 +102,9 @@ ofw_sprg_prepare(void)
static __inline void
ofw_sprg_restore(void)
{
if (!apple_hacks)
return;
/*
* Note that SPRG1-3 contents are irrelevant. They are scratch
* registers used in the early portion of trap handling when
@ -178,15 +185,10 @@ parse_ofw_memory(phandle_t node, const char *prop, struct mem_region *output)
/*
* On Apple hardware, address_cells is always 1 for "available",
* even when it is explicitly set to 2. Then all memory above 4 GB
* should be added by hand to the available list. Detect Apple hardware
* by seeing if ofw_real_mode is set -- only Apple seems to use
* virtual-mode OF.
* even when it is explicitly set to 2. All memory above 4 GB
* also needs to be added by hand to the available list.
*/
if (strcmp(prop, "available") == 0 && !ofw_real_mode)
apple_hack_mode = 1;
if (apple_hack_mode)
if (strcmp(prop, "available") == 0 && apple_hacks)
address_cells = 1;
/*
@ -241,7 +243,7 @@ parse_ofw_memory(phandle_t node, const char *prop, struct mem_region *output)
sz = j*sizeof(output[0]);
#ifdef __powerpc64__
if (apple_hack_mode) {
if (strcmp(prop, "available") == 0 && apple_hacks) {
/* Add in regions above 4 GB to the available list */
struct mem_region himem[16];
int hisz;
@ -480,6 +482,9 @@ OF_bootstrap()
OF_init(fdt);
}
/* Apple firmware has some bugs. Check for a "mac-io" alias. */
apple_hacks = (OF_finddevice("mac-io") != -1) ? 1 : 0;
return (status);
}