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Basic VM and other minor improvements.

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Not complete, probably not fully debugged or optimized.
This commit is contained in:
Ben Gras
2008-11-19 12:26:10 +00:00
parent c888305e21
commit c078ec0331
273 changed files with 10814 additions and 4305 deletions
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87
kernel/system/do_umap.c
View File

@@ -10,6 +10,7 @@
*/
#include "../system.h"
#include "../vm.h"
#if USE_UMAP
@@ -25,8 +26,11 @@ register message *m_ptr; /* pointer to request message */
vir_bytes offset = m_ptr->CP_SRC_ADDR;
int count = m_ptr->CP_NR_BYTES;
int endpt = (int) m_ptr->CP_SRC_ENDPT;
int proc_nr;
phys_bytes phys_addr;
int proc_nr, r;
int naughty = 0;
phys_bytes phys_addr = 0, lin_addr = 0;
int caller_pn;
struct proc *targetpr, *caller;
/* Verify process number. */
if (endpt == SELF)
@@ -34,27 +38,88 @@ register message *m_ptr; /* pointer to request message */
else
if (! isokendpt(endpt, &proc_nr))
return(EINVAL);
targetpr = proc_addr(proc_nr);
okendpt(who_e, &caller_pn);
caller = proc_addr(caller_pn);
/* See which mapping should be made. */
switch(seg_type) {
case LOCAL_SEG:
phys_addr = umap_local(proc_addr(proc_nr), seg_index, offset, count);
phys_addr = lin_addr = umap_local(targetpr, seg_index, offset, count);
if(!lin_addr) return EFAULT;
CHECKRANGE_OR_SUSPEND(targetpr, lin_addr, count, 1);
naughty = 1;
break;
case REMOTE_SEG:
phys_addr = umap_remote(proc_addr(proc_nr), seg_index, offset, count);
phys_addr = lin_addr = umap_remote(targetpr, seg_index, offset, count);
if(!lin_addr) return EFAULT;
CHECKRANGE_OR_SUSPEND(targetpr, lin_addr, count, 1);
naughty = 1;
break;
#if _MINIX_CHIP == _CHIP_INTEL
case BIOS_SEG:
phys_addr = umap_bios(proc_addr(proc_nr), offset, count);
break;
#endif
case GRANT_SEG:
phys_addr = umap_grant(proc_addr(proc_nr), offset, count);
naughty = 1;
case LOCAL_VM_SEG:
if(seg_index == MEM_GRANT || seg_type == GRANT_SEG) {
vir_bytes newoffset;
endpoint_t newep;
int new_proc_nr;
if(verify_grant(targetpr->p_endpoint, ANY, offset, count, 0, 0,
&newoffset, &newep) != OK) {
kprintf("SYSTEM: do_umap: verify_grant in %s, grant %d, bytes 0x%lx, failed, caller %s\n", targetpr->p_name, offset, count, caller->p_name);
proc_stacktrace(caller);
return EFAULT;
}
if(!isokendpt(newep, &new_proc_nr)) {
kprintf("SYSTEM: do_umap: isokendpt failed\n");
return EFAULT;
}
/* New lookup. */
offset = newoffset;
targetpr = proc_addr(new_proc_nr);
seg_index = D;
}
if(seg_index == T || seg_index == D || seg_index == S) {
phys_addr = lin_addr = umap_local(targetpr, seg_index, offset, count);
} else {
kprintf("SYSTEM: bogus seg type 0x%lx\n", seg_index);
return EFAULT;
}
if(!lin_addr) {
kprintf("SYSTEM:do_umap: umap_local failed\n");
return EFAULT;
}
CHECKRANGE_OR_SUSPEND(targetpr, lin_addr, count, 1);
if(vm_lookup(targetpr, lin_addr, &phys_addr, NULL) != OK) {
kprintf("SYSTEM:do_umap: vm_lookup failed\n");
return EFAULT;
}
if(phys_addr == 0)
minix_panic("vm_lookup returned zero physical address", NO_NUM);
break;
default:
return(EINVAL);
if((r=arch_umap(targetpr, offset, count, seg_type, &lin_addr))
!= OK)
return r;
phys_addr = lin_addr;
}
if(vm_running && !vm_contiguous(targetpr, lin_addr, count)) {
kprintf("SYSTEM:do_umap: not contiguous\n");
return EFAULT;
}
m_ptr->CP_DST_ADDR = phys_addr;
if(naughty || phys_addr == 0) {
kprintf("kernel: umap 0x%x done by %d / %s, pc 0x%lx, 0x%lx -> 0x%lx\n",
seg_type, who_e, caller->p_name, caller->p_reg.pc, offset, phys_addr);
kprintf("caller stack: ");
proc_stacktrace(caller);
}
return (phys_addr == 0) ? EFAULT: OK;
}