i386/commpage/commpage.c

39  *		   The source files should be in osfmk/i386/commpage/.
42  *		   array in osfmk/i386/commpage/commpage_asm.s.  There are two
43  *		   arrays, one for the 32-bit and one for the 64-bit commpage.
61 #include <machine/commpage.h>
71 /* the lists of commpage routines are in commpage_asm.s  */
81 char	*commPagePtr32 = NULL;		// virtual addr in kernel map of 32-bit commpage
82 char	*commPagePtr64 = NULL;		// ...and of 64-bit commpage
83 char	*commPageTextPtr32 = NULL;	// virtual addr in kernel map of 32-bit commpage
84 char	*commPageTextPtr64 = NULL;	// ...and of 64-bit commpage
92 static char    *commPagePtr;		// virtual addr in kernel map of commpage we are working on
93 static commpage_address_t	commPageBaseOffset; // subtract from 32-bit runtime address to get offset in virtual commpage in kernel map
100 /* Allocate the commpage and add to the shared submap created by vm:
113 	vm_offset_t	kernel_addr = 0;	// address of commpage in kernel map
121 		panic("commpage submap is null");
124 		panic("cannot allocate commpage %d", kr);
127 		panic("cannot wire commpage: %d", kr);
138 		panic("cannot find commpage entry %d", kr);
147 		panic("cannot make entry for commpage %d", kr);
160 		panic("cannot map commpage %d", kr);
173 /* Get address (in kernel map) of a commpage field. */
193 		panic("commpage cpus==0");
299 /* Copy data into commpage. */
310        panic("commpage overlap at address 0x%p, 0x%x < 0x%x", dest, address, next);
326 /* Fill in the 32- or 64-bit commpage.  Called once for each.
336 	const char*	signature,	// "commpage 32-bit" or "commpage 64-bit"
386 		panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%p", next, commPagePtr);
395  * a new routine to the commpage.
408 				"commpage 32-bit",
414 	time_data64 = time_data32;			/* if no 64-bit commpage, point to 32-bit */
420 					_COMM_PAGE32_START_ADDRESS, /* commpage address are relative to 32-bit commpage placement */
422 					"commpage 64-bit",
483 		panic("commpage text overflow: next=0x%08x, commPagePtr=%p", next, commPagePtr);
487 /* Update commpage nanotime information.
518 	p32->nt_generation = 0;		/* mark invalid, so commpage won't try to use it */
538 /* Disable commpage gettimeofday(), forcing commpage to call through to the kernel.  */
548 /* Update commpage gettimeofday() information.  As with nanotime(), we interleave
549  * updates to the 32- and 64-bit commpage, in order to keep time more nearly in sync
569 	p32->gtod_generation = 0;		/* mark invalid, so commpage won't try to use it */
644 	/* At least 32-bit commpage must be initialized */