c5b309ff07
Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused.
110 lines
2.2 KiB
C
110 lines
2.2 KiB
C
#include "syslib.h"
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PUBLIC int sys_vmctl(endpoint_t who, int param, u32_t value)
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{
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message m;
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int r;
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m.SVMCTL_WHO = who;
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m.SVMCTL_PARAM = param;
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m.SVMCTL_VALUE = value;
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r = _taskcall(SYSTASK, SYS_VMCTL, &m);
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return(r);
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}
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PUBLIC int sys_vmctl_get_pagefault_i386(endpoint_t *who, u32_t *cr2, u32_t *err)
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{
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message m;
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int r;
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m.SVMCTL_WHO = SELF;
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m.SVMCTL_PARAM = VMCTL_GET_PAGEFAULT;
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r = _taskcall(SYSTASK, SYS_VMCTL, &m);
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if(r == OK) {
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*who = m.SVMCTL_PF_WHO;
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*cr2 = m.SVMCTL_PF_I386_CR2;
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*err = m.SVMCTL_PF_I386_ERR;
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}
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return(r);
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}
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PUBLIC int sys_vmctl_get_cr3_i386(endpoint_t who, u32_t *cr3)
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{
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message m;
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int r;
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m.SVMCTL_WHO = who;
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m.SVMCTL_PARAM = VMCTL_I386_GETCR3;
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r = _taskcall(SYSTASK, SYS_VMCTL, &m);
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if(r == OK) {
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*cr3 = m.SVMCTL_VALUE;
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}
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return(r);
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}
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PUBLIC int sys_vmctl_get_memreq(endpoint_t *who, vir_bytes *mem,
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vir_bytes *len, int *wrflag, endpoint_t *who_s, vir_bytes *mem_s,
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endpoint_t *requestor)
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{
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message m;
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int r;
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m.SVMCTL_WHO = SELF;
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m.SVMCTL_PARAM = VMCTL_MEMREQ_GET;
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r = _taskcall(SYSTASK, SYS_VMCTL, &m);
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if(r >= 0) {
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*who = m.SVMCTL_MRG_TARGET;
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*mem = m.SVMCTL_MRG_ADDR;
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*len = m.SVMCTL_MRG_LENGTH;
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*wrflag = m.SVMCTL_MRG_FLAG;
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*who_s = m.SVMCTL_MRG_EP2;
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*mem_s = m.SVMCTL_MRG_ADDR2;
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*requestor = (endpoint_t) m.SVMCTL_MRG_REQUESTOR;
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}
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return r;
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}
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PUBLIC int sys_vmctl_enable_paging(struct mem_map *map)
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{
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message m;
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m.SVMCTL_WHO = SELF;
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m.SVMCTL_PARAM = VMCTL_ENABLE_PAGING;
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m.SVMCTL_VALUE = (int) map;
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return _taskcall(SYSTASK, SYS_VMCTL, &m);
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}
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PUBLIC int sys_vmctl_get_mapping(int index,
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phys_bytes *addr, phys_bytes *len, int *flags)
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{
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int r;
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message m;
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m.SVMCTL_WHO = SELF;
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m.SVMCTL_PARAM = VMCTL_KERN_PHYSMAP;
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m.SVMCTL_VALUE = (int) index;
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r = _taskcall(SYSTASK, SYS_VMCTL, &m);
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if(r != OK)
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return r;
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*addr = m.SVMCTL_MAP_PHYS_ADDR;
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*len = m.SVMCTL_MAP_PHYS_LEN;
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*flags = m.SVMCTL_MAP_FLAGS;
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return OK;
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}
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PUBLIC int sys_vmctl_reply_mapping(int index, vir_bytes addr)
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{
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int r;
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message m;
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m.SVMCTL_WHO = SELF;
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m.SVMCTL_PARAM = VMCTL_KERN_MAP_REPLY;
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m.SVMCTL_VALUE = index;
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m.SVMCTL_MAP_VIR_ADDR = (char *) addr;
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return _taskcall(SYSTASK, SYS_VMCTL, &m);
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}
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