VM: Remove legacy non-paging code paths
This commit is contained in:
parent
e7e6508854
commit
b641afc78a
8 changed files with 59 additions and 249 deletions
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@ -15,7 +15,6 @@
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* do_exec_newmem: allocate new memory map for a process that tries to exec
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* do_exec_newmem: allocate new memory map for a process that tries to exec
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* do_execrestart: finish the special exec call for RS
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* do_execrestart: finish the special exec call for RS
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* exec_restart: finish a regular exec call
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* exec_restart: finish a regular exec call
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* find_share: find a process whose text segment can be shared
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*/
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*/
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#include "pm.h"
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#include "pm.h"
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@ -181,44 +181,11 @@ PUBLIC phys_clicks alloc_mem(phys_clicks clicks, u32_t memflags)
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clicks += align_clicks;
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clicks += align_clicks;
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}
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}
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if(vm_paged) {
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mem = alloc_pages(clicks, memflags, NULL);
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mem = alloc_pages(clicks, memflags, NULL);
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if(mem == NO_MEM) {
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if(mem == NO_MEM) {
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free_yielded(clicks * CLICK_SIZE);
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free_yielded(clicks * CLICK_SIZE);
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mem = alloc_pages(clicks, memflags, NULL);
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mem = alloc_pages(clicks, memflags, NULL);
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}
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}
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} else {
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CHECKHOLES;
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prev_ptr = NULL;
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hp = hole_head;
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while (hp != NULL) {
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if (hp->h_len >= clicks) {
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/* We found a hole that is big enough. Use it. */
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old_base = hp->h_base; /* remember where it started */
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hp->h_base += clicks; /* bite a piece off */
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hp->h_len -= clicks; /* ditto */
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/* Delete the hole if used up completely. */
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if (hp->h_len == 0) del_slot(prev_ptr, hp);
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/* Anything special needs to happen? */
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if(memflags & PAF_CLEAR) {
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if ((s= sys_memset(0, CLICK_SIZE*old_base,
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CLICK_SIZE*clicks)) != OK) {
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panic("alloc_mem: sys_memset failed: %d", s);
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}
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}
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/* Return the start address of the acquired block. */
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CHECKHOLES;
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mem = old_base;
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break;
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}
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prev_ptr = hp;
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hp = hp->h_next;
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}
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}
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if(mem == NO_MEM)
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if(mem == NO_MEM)
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return mem;
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return mem;
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@ -255,11 +222,9 @@ CHECKHOLES;
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if (clicks == 0) return;
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if (clicks == 0) return;
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if(vm_paged) {
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assert(CLICK_SIZE == VM_PAGE_SIZE);
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assert(CLICK_SIZE == VM_PAGE_SIZE);
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free_pages(base, clicks);
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free_pages(base, clicks);
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return;
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return;
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}
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if ( (new_ptr = free_slots) == NULL)
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if ( (new_ptr = free_slots) == NULL)
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panic("hole table full");
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panic("hole table full");
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@ -30,41 +30,12 @@
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#include "memory.h"
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#include "memory.h"
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FORWARD _PROTOTYPE( int new_mem, (struct vmproc *vmp, struct vmproc *sh_vmp,
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FORWARD _PROTOTYPE( int new_mem, (struct vmproc *vmp,
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vir_bytes text_bytes, vir_bytes data_bytes, vir_bytes bss_bytes,
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vir_bytes text_bytes, vir_bytes data_bytes, vir_bytes bss_bytes,
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vir_bytes stk_bytes, phys_bytes tot_bytes, vir_bytes *stack_top));
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vir_bytes stk_bytes, phys_bytes tot_bytes, vir_bytes *stack_top));
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static int failcount;
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static int failcount;
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/*===========================================================================*
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* find_share *
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*===========================================================================*/
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PUBLIC struct vmproc *find_share(
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struct vmproc *vmp_ign, /* process that should not be looked at */
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ino_t ino, /* parameters that uniquely identify a file */
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dev_t dev,
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time_t ctime
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)
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{
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/* Look for a process that is the file <ino, dev, ctime> in execution. Don't
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* accidentally "find" vmp_ign, because it is the process on whose behalf this
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* call is made.
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*/
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struct vmproc *vmp;
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for (vmp = &vmproc[0]; vmp < &vmproc[NR_PROCS]; vmp++) {
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if (!(vmp->vm_flags & VMF_INUSE)) continue;
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if (!(vmp->vm_flags & VMF_SEPARATE)) continue;
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if (vmp->vm_flags & VMF_HASPT) continue;
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if (vmp == vmp_ign) continue;
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if (vmp->vm_ino != ino) continue;
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if (vmp->vm_dev != dev) continue;
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if (vmp->vm_ctime != ctime) continue;
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return vmp;
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}
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return(NULL);
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}
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/*===========================================================================*
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/*===========================================================================*
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* exec_newmem *
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* exec_newmem *
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*===========================================================================*/
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*===========================================================================*/
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@ -73,7 +44,7 @@ PUBLIC int do_exec_newmem(message *msg)
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int r, proc_e, proc_n;
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int r, proc_e, proc_n;
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vir_bytes stack_top;
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vir_bytes stack_top;
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vir_clicks tc, dc, sc, totc, dvir, s_vir;
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vir_clicks tc, dc, sc, totc, dvir, s_vir;
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struct vmproc *vmp, *sh_mp;
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struct vmproc *vmp;
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char *ptr;
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char *ptr;
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struct exec_newmem args;
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struct exec_newmem args;
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@ -126,17 +97,10 @@ SANITYCHECK(SCL_DETAIL);
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return r;
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return r;
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}
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}
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/* Can the process' text be shared with that of one already running? */
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if(!vm_paged) {
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sh_mp = find_share(vmp, args.st_ino, args.st_dev, args.st_ctime);
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} else {
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sh_mp = NULL;
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}
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/* Allocate new memory and release old memory. Fix map and tell
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/* Allocate new memory and release old memory. Fix map and tell
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* kernel.
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* kernel.
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*/
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*/
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r = new_mem(vmp, sh_mp, args.text_bytes, args.data_bytes,
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r = new_mem(vmp, args.text_bytes, args.data_bytes,
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args.bss_bytes, args.args_bytes, args.tot_bytes, &stack_top);
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args.bss_bytes, args.args_bytes, args.tot_bytes, &stack_top);
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if (r != OK) {
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if (r != OK) {
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printf("VM: newmem: new_mem failed\n");
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printf("VM: newmem: new_mem failed\n");
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@ -156,7 +120,6 @@ SANITYCHECK(SCL_DETAIL);
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msg->VMEN_STACK_TOP = (void *) stack_top;
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msg->VMEN_STACK_TOP = (void *) stack_top;
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msg->VMEN_FLAGS = 0;
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msg->VMEN_FLAGS = 0;
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if (!sh_mp) /* Load text if sh_mp = NULL */
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msg->VMEN_FLAGS |= EXC_NM_RF_LOAD_TEXT;
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msg->VMEN_FLAGS |= EXC_NM_RF_LOAD_TEXT;
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return OK;
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return OK;
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@ -165,10 +128,9 @@ SANITYCHECK(SCL_DETAIL);
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/*===========================================================================*
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/*===========================================================================*
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* new_mem *
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* new_mem *
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*===========================================================================*/
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*===========================================================================*/
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PRIVATE int new_mem(rmp, sh_mp, text_bytes, data_bytes,
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PRIVATE int new_mem(rmp, text_bytes, data_bytes,
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bss_bytes,stk_bytes,tot_bytes,stack_top)
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bss_bytes,stk_bytes,tot_bytes,stack_top)
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struct vmproc *rmp; /* process to get a new memory map */
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struct vmproc *rmp; /* process to get a new memory map */
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struct vmproc *sh_mp; /* text can be shared with this process */
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vir_bytes text_bytes; /* text segment size in bytes */
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vir_bytes text_bytes; /* text segment size in bytes */
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vir_bytes data_bytes; /* size of initialized data in bytes */
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vir_bytes data_bytes; /* size of initialized data in bytes */
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vir_bytes bss_bytes; /* size of bss in bytes */
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vir_bytes bss_bytes; /* size of bss in bytes */
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@ -184,18 +146,11 @@ vir_bytes *stack_top; /* top of process stack */
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phys_bytes bytes, base, bss_offset;
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phys_bytes bytes, base, bss_offset;
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int s, r2, r, hadpt = 0;
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int s, r2, r, hadpt = 0;
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struct vmproc *vmpold = &vmproc[VMP_EXECTMP];
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struct vmproc *vmpold = &vmproc[VMP_EXECTMP];
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int ptok = 1;
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SANITYCHECK(SCL_FUNCTIONS);
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SANITYCHECK(SCL_FUNCTIONS);
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if(rmp->vm_flags & VMF_HASPT) {
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assert(rmp->vm_flags & VMF_HASPT);
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hadpt = 1;
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}
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/* No need to allocate text if it can be shared. */
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if (sh_mp != NULL) {
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text_bytes = 0;
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assert(!vm_paged);
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}
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/* Acquire the new memory. Each of the 4 parts: text, (data+bss), gap,
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/* Acquire the new memory. Each of the 4 parts: text, (data+bss), gap,
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* and stack occupies an integral number of clicks, starting at click
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* and stack occupies an integral number of clicks, starting at click
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@ -221,34 +176,18 @@ vir_bytes *stack_top; /* top of process stack */
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* Just recreate it in the case that we have to revert.
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* Just recreate it in the case that we have to revert.
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*/
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*/
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SANITYCHECK(SCL_DETAIL);
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SANITYCHECK(SCL_DETAIL);
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if(hadpt) {
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rmp->vm_flags &= ~VMF_HASPT;
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rmp->vm_flags &= ~VMF_HASPT;
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pt_free(&rmp->vm_pt);
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pt_free(&rmp->vm_pt);
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}
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assert(!(vmpold->vm_flags & VMF_INUSE));
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assert(!(vmpold->vm_flags & VMF_INUSE));
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*vmpold = *rmp; /* copy current state. */
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*vmpold = *rmp; /* copy current state. */
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rmp->vm_regions = NULL; /* exec()ing process regions thrown out. */
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rmp->vm_regions = NULL; /* exec()ing process regions thrown out. */
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SANITYCHECK(SCL_DETAIL);
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SANITYCHECK(SCL_DETAIL);
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if(!hadpt) {
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if (find_share(rmp, rmp->vm_ino, rmp->vm_dev, rmp->vm_ctime) == NULL) {
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/* No other process shares the text segment, so free it. */
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free_mem(rmp->vm_arch.vm_seg[T].mem_phys, rmp->vm_arch.vm_seg[T].mem_len);
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}
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/* Free the data and stack segments. */
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free_mem(rmp->vm_arch.vm_seg[D].mem_phys,
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rmp->vm_arch.vm_seg[S].mem_vir
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+ rmp->vm_arch.vm_seg[S].mem_len
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- rmp->vm_arch.vm_seg[D].mem_vir);
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}
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/* Build new process in current slot, without freeing old
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/* Build new process in current slot, without freeing old
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* one. If it fails, revert.
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* one. If it fails, revert.
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*/
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*/
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if(vm_paged) {
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int ptok = 1;
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SANITYCHECK(SCL_DETAIL);
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SANITYCHECK(SCL_DETAIL);
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if((r=pt_new(&rmp->vm_pt)) != OK) {
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if((r=pt_new(&rmp->vm_pt)) != OK) {
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ptok = 0;
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ptok = 0;
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@ -299,78 +238,8 @@ SANITYCHECK(SCL_DETAIL);
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clear_proc(vmpold); /* disappear. */
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clear_proc(vmpold); /* disappear. */
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SANITYCHECK(SCL_DETAIL);
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SANITYCHECK(SCL_DETAIL);
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*stack_top = VM_STACKTOP;
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*stack_top = VM_STACKTOP;
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} else {
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phys_clicks new_base;
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new_base = alloc_mem(text_clicks + tot_clicks, 0);
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SANITYCHECK(SCL_FUNCTIONS);
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if (new_base == NO_MEM) {
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printf("VM: new_mem: alloc_mem failed\n");
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return(ENOMEM);
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}
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if (sh_mp != NULL) {
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/* Share the text segment. */
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rmp->vm_arch.vm_seg[T] = sh_mp->vm_arch.vm_seg[T];
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} else {
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rmp->vm_arch.vm_seg[T].mem_phys = new_base;
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rmp->vm_arch.vm_seg[T].mem_vir = 0;
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rmp->vm_arch.vm_seg[T].mem_len = text_clicks;
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if (text_clicks > 0)
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{
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/* Zero the last click of the text segment. Otherwise the
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* part of that click may remain unchanged.
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*/
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base = (phys_bytes)(new_base+text_clicks-1) << CLICK_SHIFT;
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if ((s= sys_memset(0, base, CLICK_SIZE)) != OK)
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panic("new_mem: sys_memset failed: %d", s);
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}
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}
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/* No paging stuff. */
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rmp->vm_flags &= ~VMF_HASPT;
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rmp->vm_regions = NULL;
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rmp->vm_arch.vm_seg[D].mem_phys = new_base + text_clicks;
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rmp->vm_arch.vm_seg[D].mem_vir = 0;
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rmp->vm_arch.vm_seg[D].mem_len = data_clicks;
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rmp->vm_arch.vm_seg[S].mem_phys = rmp->vm_arch.vm_seg[D].mem_phys +
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data_clicks + gap_clicks;
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rmp->vm_arch.vm_seg[S].mem_vir = rmp->vm_arch.vm_seg[D].mem_vir +
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data_clicks + gap_clicks;
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rmp->vm_arch.vm_seg[S].mem_len = stack_clicks;
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rmp->vm_stacktop =
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CLICK2ABS(rmp->vm_arch.vm_seg[S].mem_vir +
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rmp->vm_arch.vm_seg[S].mem_len);
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rmp->vm_arch.vm_data_top =
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(rmp->vm_arch.vm_seg[S].mem_vir +
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rmp->vm_arch.vm_seg[S].mem_len) << CLICK_SHIFT;
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if((r2=sys_newmap(rmp->vm_endpoint, rmp->vm_arch.vm_seg)) != OK) {
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/* report new map to the kernel */
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panic("sys_newmap failed: %d", r2);
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}
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/* Zero the bss, gap, and stack segment. */
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bytes = (phys_bytes)(data_clicks + gap_clicks + stack_clicks) << CLICK_SHIFT;
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base = (phys_bytes) rmp->vm_arch.vm_seg[D].mem_phys << CLICK_SHIFT;
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bss_offset = (data_bytes >> CLICK_SHIFT) << CLICK_SHIFT;
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base += bss_offset;
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bytes -= bss_offset;
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if ((s=sys_memset(0, base, bytes)) != OK) {
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panic("new_mem can't zero: %d", s);
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}
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/* Tell kernel this thing has no page table. */
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if((s=pt_bind(NULL, rmp)) != OK)
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panic("exec_newmem: pt_bind failed: %d", s);
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*stack_top= ((vir_bytes)rmp->vm_arch.vm_seg[S].mem_vir << CLICK_SHIFT) +
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((vir_bytes)rmp->vm_arch.vm_seg[S].mem_len << CLICK_SHIFT);
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}
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SANITYCHECK(SCL_FUNCTIONS);
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return(OK);
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return(OK);
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}
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}
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@ -70,25 +70,12 @@ SANITYCHECK(SCL_FUNCTIONS);
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if(vmp->vm_flags & VMF_HAS_DMA) {
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if(vmp->vm_flags & VMF_HAS_DMA) {
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release_dma(vmp);
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release_dma(vmp);
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} else if(vmp->vm_flags & VMF_HASPT) {
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} else {
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assert(vmp->vm_flags & VMF_HASPT);
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/* Free pagetable and pages allocated by pt code. */
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/* Free pagetable and pages allocated by pt code. */
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SANITYCHECK(SCL_DETAIL);
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SANITYCHECK(SCL_DETAIL);
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free_proc(vmp);
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free_proc(vmp);
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SANITYCHECK(SCL_DETAIL);
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SANITYCHECK(SCL_DETAIL);
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} else {
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/* Free the data and stack segments. */
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free_mem(vmp->vm_arch.vm_seg[D].mem_phys,
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vmp->vm_arch.vm_seg[S].mem_vir +
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vmp->vm_arch.vm_seg[S].mem_len -
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vmp->vm_arch.vm_seg[D].mem_vir);
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if (find_share(vmp, vmp->vm_ino, vmp->vm_dev, vmp->vm_ctime) == NULL) {
|
|
||||||
/* No other process shares the text segment,
|
|
||||||
* so free it.
|
|
||||||
*/
|
|
||||||
free_mem(vmp->vm_arch.vm_seg[T].mem_phys,
|
|
||||||
vmp->vm_arch.vm_seg[T].mem_len);
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
SANITYCHECK(SCL_DETAIL);
|
SANITYCHECK(SCL_DETAIL);
|
||||||
|
|
||||||
|
|
|
@ -27,7 +27,4 @@ EXTERN long vm_sanitychecklevel;
|
||||||
/* total number of memory pages */
|
/* total number of memory pages */
|
||||||
EXTERN int total_pages;
|
EXTERN int total_pages;
|
||||||
|
|
||||||
/* vm operation mode state and values */
|
|
||||||
EXTERN long vm_paged;
|
|
||||||
|
|
||||||
EXTERN int meminit_done;
|
EXTERN int meminit_done;
|
||||||
|
|
|
@ -183,8 +183,6 @@ PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
|
||||||
incheck = nocheck = 0;
|
incheck = nocheck = 0;
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
vm_paged = 1;
|
|
||||||
env_parse("vm_paged", "d", 0, &vm_paged, 0, 1);
|
|
||||||
#if SANITYCHECKS
|
#if SANITYCHECKS
|
||||||
env_parse("vm_sanitychecklevel", "d", 0, &vm_sanitychecklevel, 0, SCL_MAX);
|
env_parse("vm_sanitychecklevel", "d", 0, &vm_sanitychecklevel, 0, SCL_MAX);
|
||||||
#endif
|
#endif
|
||||||
|
|
|
@ -56,8 +56,6 @@ _PROTOTYPE( void free_proc, (struct vmproc *vmp) );
|
||||||
_PROTOTYPE( int do_fork, (message *msg) );
|
_PROTOTYPE( int do_fork, (message *msg) );
|
||||||
|
|
||||||
/* exec.c */
|
/* exec.c */
|
||||||
_PROTOTYPE( struct vmproc *find_share, (struct vmproc *vmp_ign, Ino_t ino,
|
|
||||||
dev_t dev, time_t ctime) );
|
|
||||||
_PROTOTYPE( int do_exec_newmem, (message *msg) );
|
_PROTOTYPE( int do_exec_newmem, (message *msg) );
|
||||||
_PROTOTYPE( int proc_new, (struct vmproc *vmp, phys_bytes start,
|
_PROTOTYPE( int proc_new, (struct vmproc *vmp, phys_bytes start,
|
||||||
phys_bytes text, phys_bytes data, phys_bytes stack, phys_bytes gap,
|
phys_bytes text, phys_bytes data, phys_bytes stack, phys_bytes gap,
|
||||||
|
|
|
@ -348,9 +348,6 @@ PRIVATE vir_bytes region_find_slot(struct vmproc *vmp,
|
||||||
|
|
||||||
SANITYCHECK(SCL_FUNCTIONS);
|
SANITYCHECK(SCL_FUNCTIONS);
|
||||||
|
|
||||||
/* We must be in paged mode to be able to do this. */
|
|
||||||
assert(vm_paged);
|
|
||||||
|
|
||||||
/* Length must be reasonable. */
|
/* Length must be reasonable. */
|
||||||
assert(length > 0);
|
assert(length > 0);
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue