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Implement is_physical_memory. Accessing memory which doesn't exist causes

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traps that are difficult to recover from, so we check against the memory
map returned by the prom.
This commit is contained in:
Jake Burkholder 2003-03-15 23:59:00 +00:00
parent 8b247b5adc
commit d647b74e54
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=112306
1 changed files with 9 additions and 3 deletions
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12
sys/sparc64/sparc64/vm_machdep.c
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@ -75,9 +75,13 @@
#include <machine/frame.h>
#include <machine/md_var.h>
#include <machine/ofw_machdep.h>
#include <machine/ofw_mem.h>
#include <machine/tlb.h>
#include <machine/tstate.h>
extern struct ofw_mem_region sparc64_memreg[];
extern int sparc64_nmemreg;
PMAP_STATS_VAR(uma_nsmall_alloc);
PMAP_STATS_VAR(uma_nsmall_alloc_oc);
PMAP_STATS_VAR(uma_nsmall_free);
@ -295,9 +299,12 @@ cpu_wait(struct proc *p)
int
is_physical_memory(vm_offset_t addr)
{
struct ofw_mem_region *mr;
/* There is no device memory in the midst of the normal RAM. */
return (1);
for (mr = sparc64_memreg; mr < sparc64_memreg + sparc64_nmemreg; mr++)
if (addr >= mr->mr_start && addr < mr->mr_start + mr->mr_size)
return (1);
return (0);
}
void
@ -367,4 +374,3 @@ uma_small_free(void *mem, int size, u_int8_t flags)
vm_page_free(m);
vm_page_unlock_queues();
}