diff options
| -rw-r--r-- | sys/arm/arm/physmem.c | 29 | ||||
| -rw-r--r-- | sys/arm/include/md_var.h | 1 |
2 files changed, 24 insertions, 6 deletions
diff --git a/sys/arm/arm/physmem.c b/sys/arm/arm/physmem.c index 8618e46..eae03f7 100644 --- a/sys/arm/arm/physmem.c +++ b/sys/arm/arm/physmem.c @@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <vm/vm.h> +#include <machine/md_var.h> #include <machine/physmem.h> /* @@ -86,8 +87,12 @@ static size_t excnt; vm_paddr_t phys_avail[MAX_AVAIL_ENTRIES + 2]; /* +2 to allow for a pair */ vm_paddr_t dump_avail[MAX_AVAIL_ENTRIES + 2]; /* of zeroes to terminate. */ -/* This is the total number of hardware pages, excluded or not. */ +/* + * realmem is the total number of hardware pages, excluded or not. + * Maxmem is one greater than the last physical page number. + */ long realmem; +long Maxmem; /* The address at which the kernel was loaded. Set early in initarm(). */ vm_paddr_t arm_physmem_kernaddr; @@ -152,8 +157,8 @@ arm_physmem_print_tables() * * Returns the number of pages of non-excluded memory added to the avail list. */ -static long -regions_to_avail(vm_paddr_t *avail, uint32_t exflags) +static size_t +regions_to_avail(vm_paddr_t *avail, uint32_t exflags, long *pavail) { size_t acnt, exi, hwi; vm_paddr_t end, start, xend, xstart; @@ -236,7 +241,9 @@ regions_to_avail(vm_paddr_t *avail, uint32_t exflags) panic("Not enough space in the dump/phys_avail arrays"); } - return (availmem); + if (pavail) + *pavail = availmem; + return (acnt); } /* @@ -311,13 +318,23 @@ void arm_physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t exflags) /* * Process all the regions added earlier into the global avail lists. + * + * Updates the kernel global 'physmem' with the number of physical pages + * available for use (all pages not in any exclusion region). + * + * Updates the kernel global 'Maxmem' with the page number one greater then the + * last page of physical memory in the system. */ void arm_physmem_init_kernel_globals(void) { + size_t nextidx; - regions_to_avail(dump_avail, EXFLAG_NODUMP); - physmem = regions_to_avail(phys_avail, EXFLAG_NOALLOC); + regions_to_avail(dump_avail, EXFLAG_NODUMP, NULL); + nextidx = regions_to_avail(phys_avail, EXFLAG_NOALLOC, &physmem); + if (nextidx == 0) + panic("No memory entries in phys_avail"); + Maxmem = atop(phys_avail[nextidx - 1]); } #ifdef DDB diff --git a/sys/arm/include/md_var.h b/sys/arm/include/md_var.h index 7337b33..44daf0e 100644 --- a/sys/arm/include/md_var.h +++ b/sys/arm/include/md_var.h @@ -33,6 +33,7 @@ #ifndef _MACHINE_MD_VAR_H_ #define _MACHINE_MD_VAR_H_ +extern long Maxmem; extern char sigcode[]; extern int szsigcode; extern uint32_t *vm_page_dump; |
