Check the real-mode? OF property to find out whether we operate in real or
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:
parent
cb1b50fa7c
commit
da068879c5
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=215438
@ -91,16 +91,22 @@ ofw_mapmem(vm_offset_t dest, const size_t len)
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return (ENOMEM);
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}
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if (OF_call_method("claim", mmu, 3, 1, destp, dlen, 0, &addr) == -1) {
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printf("ofw_mapmem: virtual claim failed\n");
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return (ENOMEM);
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}
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if (OF_call_method("map", mmu, 4, 0, destp, destp, dlen, 0) == -1) {
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printf("ofw_mapmem: map failed\n");
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return (ENOMEM);
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}
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/*
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* We only do virtual memory management when real_mode is false.
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*/
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if (real_mode == 0) {
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if (OF_call_method("claim", mmu, 3, 1, destp, dlen, 0, &addr)
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== -1) {
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printf("ofw_mapmem: virtual claim failed\n");
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return (ENOMEM);
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}
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if (OF_call_method("map", mmu, 4, 0, destp, destp, dlen, 0)
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== -1) {
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printf("ofw_mapmem: map failed\n");
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return (ENOMEM);
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}
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}
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last_dest = (vm_offset_t) destp;
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last_len = dlen;
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@ -69,12 +69,15 @@ int (*openfirmware)(void *);
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phandle_t chosen;
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ihandle_t mmu;
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ihandle_t memory;
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int real_mode = 0;
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/* Initialiser */
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void
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OF_init(int (*openfirm)(void *))
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{
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phandle_t options;
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char mode[8];
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openfirmware = openfirm;
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@ -89,6 +92,15 @@ OF_init(int (*openfirm)(void *))
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}
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if (OF_getprop(chosen, "mmu", &mmu, sizeof(mmu)) == -1)
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OF_exit();
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/*
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* Check if we run in real mode. If so, we do not need to map
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* memory later on.
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*/
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options = OF_finddevice("/options");
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OF_getprop(options, "real-mode?", mode, sizeof(mode));
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if (strncmp(mode, "true", 4) == 0)
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real_mode = 1;
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}
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/*
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@ -72,6 +72,7 @@ typedef unsigned long int cell_t;
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extern int (*openfirmware)(void *);
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extern phandle_t chosen;
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extern ihandle_t memory, mmu;
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extern int real_mode;
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/*
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* This isn't actually an Open Firmware function, but it seemed like the right
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