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Code Issues Releases Activity

- Add a mutex for synchronizing the use of CMAP/CADDR 1 and 2.

Browse Source 
- Eliminate small style differences between pmap_zero_page(),
   pmap_copy_page(), etc.
This commit is contained in:
Alan Cox 2003-02-14 07:34:28 +00:00
parent 05d1e23aa7
commit e33d37b66f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=110845
2 changed files with 24 additions and 18 deletions
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21
sys/amd64/amd64/pmap.c
View File

@ -181,6 +181,7 @@ pt_entry_t *CMAP1 = 0;
static pt_entry_t *CMAP2, *CMAP3, *ptmmap;
caddr_t CADDR1 = 0, ptvmmap = 0;
static caddr_t CADDR2, CADDR3;
static struct mtx CMAPCADDR12_lock;
static pt_entry_t *msgbufmap;
struct msgbuf *msgbufp = 0;
@ -343,6 +344,8 @@ pmap_bootstrap(firstaddr, loadaddr)
SYSMAP(caddr_t, CMAP2, CADDR2, 1)
SYSMAP(caddr_t, CMAP3, CADDR3, 1)
mtx_init(&CMAPCADDR12_lock, "CMAPCADDR12", NULL, MTX_DEF);
/*
* Crashdump maps.
*/
@ -2765,12 +2768,11 @@ pmap_zpi_switchin3(void)
void
pmap_zero_page(vm_page_t m)
{
vm_offset_t phys;
phys = VM_PAGE_TO_PHYS(m);
mtx_lock(&CMAPCADDR12_lock);
if (*CMAP2)
panic("pmap_zero_page: CMAP2 busy");
*CMAP2 = PG_V | PG_RW | phys | PG_A | PG_M;
*CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) | PG_A | PG_M;
#ifdef I386_CPU
invltlb();
#else
@ -2789,6 +2791,7 @@ pmap_zero_page(vm_page_t m)
curthread->td_switchin = NULL;
#endif
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
/*
@ -2800,12 +2803,11 @@ pmap_zero_page(vm_page_t m)
void
pmap_zero_page_area(vm_page_t m, int off, int size)
{
vm_offset_t phys;
phys = VM_PAGE_TO_PHYS(m);
mtx_lock(&CMAPCADDR12_lock);
if (*CMAP2)
panic("pmap_zero_page: CMAP2 busy");
*CMAP2 = PG_V | PG_RW | phys | PG_A | PG_M;
*CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) | PG_A | PG_M;
#ifdef I386_CPU
invltlb();
#else
@ -2824,6 +2826,7 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
curthread->td_switchin = NULL;
#endif
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
/*
@ -2835,12 +2838,10 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
void
pmap_zero_page_idle(vm_page_t m)
{
vm_offset_t phys;
phys = VM_PAGE_TO_PHYS(m);
if (*CMAP3)
panic("pmap_zero_page: CMAP3 busy");
*CMAP3 = PG_V | PG_RW | phys | PG_A | PG_M;
*CMAP3 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) | PG_A | PG_M;
#ifdef I386_CPU
invltlb();
#else
@ -2871,6 +2872,7 @@ void
pmap_copy_page(vm_page_t src, vm_page_t dst)
{
mtx_lock(&CMAPCADDR12_lock);
if (*CMAP1)
panic("pmap_copy_page: CMAP1 busy");
if (*CMAP2)
@ -2892,6 +2894,7 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
#endif
*CMAP1 = 0;
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
/*

21
sys/i386/i386/pmap.c
View File

@ -181,6 +181,7 @@ pt_entry_t *CMAP1 = 0;
static pt_entry_t *CMAP2, *CMAP3, *ptmmap;
caddr_t CADDR1 = 0, ptvmmap = 0;
static caddr_t CADDR2, CADDR3;
static struct mtx CMAPCADDR12_lock;
static pt_entry_t *msgbufmap;
struct msgbuf *msgbufp = 0;
@ -343,6 +344,8 @@ pmap_bootstrap(firstaddr, loadaddr)
SYSMAP(caddr_t, CMAP2, CADDR2, 1)
SYSMAP(caddr_t, CMAP3, CADDR3, 1)
mtx_init(&CMAPCADDR12_lock, "CMAPCADDR12", NULL, MTX_DEF);
/*
* Crashdump maps.
*/
@ -2765,12 +2768,11 @@ pmap_zpi_switchin3(void)
void
pmap_zero_page(vm_page_t m)
{
vm_offset_t phys;
phys = VM_PAGE_TO_PHYS(m);
mtx_lock(&CMAPCADDR12_lock);
if (*CMAP2)
panic("pmap_zero_page: CMAP2 busy");
*CMAP2 = PG_V | PG_RW | phys | PG_A | PG_M;
*CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) | PG_A | PG_M;
#ifdef I386_CPU
invltlb();
#else
@ -2789,6 +2791,7 @@ pmap_zero_page(vm_page_t m)
curthread->td_switchin = NULL;
#endif
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
/*
@ -2800,12 +2803,11 @@ pmap_zero_page(vm_page_t m)
void
pmap_zero_page_area(vm_page_t m, int off, int size)
{
vm_offset_t phys;
phys = VM_PAGE_TO_PHYS(m);
mtx_lock(&CMAPCADDR12_lock);
if (*CMAP2)
panic("pmap_zero_page: CMAP2 busy");
*CMAP2 = PG_V | PG_RW | phys | PG_A | PG_M;
*CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) | PG_A | PG_M;
#ifdef I386_CPU
invltlb();
#else
@ -2824,6 +2826,7 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
curthread->td_switchin = NULL;
#endif
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
/*
@ -2835,12 +2838,10 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
void
pmap_zero_page_idle(vm_page_t m)
{
vm_offset_t phys;
phys = VM_PAGE_TO_PHYS(m);
if (*CMAP3)
panic("pmap_zero_page: CMAP3 busy");
*CMAP3 = PG_V | PG_RW | phys | PG_A | PG_M;
*CMAP3 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) | PG_A | PG_M;
#ifdef I386_CPU
invltlb();
#else
@ -2871,6 +2872,7 @@ void
pmap_copy_page(vm_page_t src, vm_page_t dst)
{
mtx_lock(&CMAPCADDR12_lock);
if (*CMAP1)
panic("pmap_copy_page: CMAP1 busy");
if (*CMAP2)
@ -2892,6 +2894,7 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
#endif
*CMAP1 = 0;
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
/*