diff options
Diffstat (limited to 'kernel/vmem.c')
| -rw-r--r-- | kernel/vmem.c | 55 |
1 files changed, 34 insertions, 21 deletions
diff --git a/kernel/vmem.c b/kernel/vmem.c index 0c751b8..4af596d 100644 --- a/kernel/vmem.c +++ b/kernel/vmem.c @@ -299,7 +299,8 @@ pdirectory* vmem_kernel_dir() vmem_add_identity(dir,0,1024*8,false);//identity map first 32 megs... vmem_add_identity(dir,e1000_addr,32,false);//identity map 32 pages for e1000 - vmem_add_remap(dir,fb_addr,VMEM_FRAMEBUFFER,1024*8,false);//32megs should be enough for 4k (think about pitch) + vmem_add_remap(dir,fb_addr,VMEM_FRAMEBUFFER,VMEM_FRAMEBUFFER_PAGES,true);//32megs should be enough for 4k (think about pitch) + vmem_add_remap(dir,local_apic_addr,VMEM_LAPIC,1,false); //apic addr should be at pagestart, right? TODO: check. vmem_add_remap(dir,io_apic_addr,VMEM_IOAPIC,1,false); vmem_add_remap(dir,mod_start,VMEM_EXT2_RAMIMAGE,1024*8,false);//32megs for ramimage: TODO: check if enough? @@ -321,6 +322,8 @@ void vmem_free_space_dir(pdirectory *dir,bool stack_only) fixme("stack_only version too!"); klog("free page directory at: 0x%X",dir); + if(stack_only)kpanic("not implemented yet!"); + //free user pages uint32_t virt=0; for(int i=0;i<1024;i++) @@ -333,6 +336,7 @@ void vmem_free_space_dir(pdirectory *dir,bool stack_only) for(int j=0;j<1024;j++) { + if(virt>=VMEM_FRAMEBUFFER&&virt<VMEM_FRAMEBUFFER+VMEM_FRAMEBUFFER_PAGES*4096)continue; // skip framebuffer pls uint32_t src_pd=src_table->m_entries[j]; uint32_t src_phys=pd_entry_get_frame(&src_pd); @@ -340,6 +344,7 @@ void vmem_free_space_dir(pdirectory *dir,bool stack_only) { mem_free_block(src_phys); } + virt+=4096; } } @@ -360,13 +365,7 @@ pdirectory* vmem_new_space_dir(pdirectory *copy_dir,bool stack_only) if(!pt_entry_is_user(src_pt))dir->m_entries [i]=src_pt; } - // threads share this // - if(stack_only) - { - // TODO - kpanic("not impl!"); - } - else + if(!stack_only) { vmem_add_alloc(dir,VMEM_USER_PROG,VMEM_USER_PROG_PAGES,true); vmem_add_alloc(dir,VMEM_USER_ENV,1,true); @@ -392,6 +391,8 @@ pdirectory* vmem_new_space_dir(pdirectory *copy_dir,bool stack_only) for(int j=0;j<1024;j++) { + if(virt>=VMEM_FRAMEBUFFER&&virt<VMEM_FRAMEBUFFER+VMEM_FRAMEBUFFER_PAGES*4096)continue; // skip framebuffer pls + uint32_t src_pd=src_table->m_entries[j]; uint32_t dst_pd=dst_table->m_entries[j]; @@ -400,24 +401,36 @@ pdirectory* vmem_new_space_dir(pdirectory *copy_dir,bool stack_only) if(src_pd) { - //klog("copy virt: %x / phys: %x -> %x",virt,src_phys,dst_phys); - - vmem_clear_one(mydir,VMEM_COPY_PAGE); - vmem_clear_one(mydir,VMEM_COPY_PAGE+4096); - - vmem_add_remap(mydir,src_phys,VMEM_COPY_PAGE,1,false); - vmem_add_remap(mydir,dst_phys,VMEM_COPY_PAGE+4096,1,false); - - x86_invlpg(VMEM_COPY_PAGE); // refresh TLB - x86_invlpg(VMEM_COPY_PAGE+4096); // refresh TLB - - memcpy(VMEM_COPY_PAGE+4096,VMEM_COPY_PAGE,4096); - } + if(stack_only&&(virt==VMEM_USER_ENV||(virt>=VMEM_USER_PROG&&virt<VMEM_USER_PROG+VMEM_USER_PROG_PAGES*4096))) + { + // threads share this // + vmem_add_remap(dir,src_phys,virt,1,true); + } + else + { + + //klog("copy virt: %x / phys: %x -> %x",virt,src_phys,dst_phys); + + vmem_clear_one(mydir,VMEM_COPY_PAGE); + vmem_clear_one(mydir,VMEM_COPY_PAGE+4096); + + vmem_add_remap(mydir,src_phys,VMEM_COPY_PAGE,1,false); + vmem_add_remap(mydir,dst_phys,VMEM_COPY_PAGE+4096,1,false); + + x86_invlpg(VMEM_COPY_PAGE); // refresh TLB + x86_invlpg(VMEM_COPY_PAGE+4096); // refresh TLB + + memcpy(VMEM_COPY_PAGE+4096,VMEM_COPY_PAGE,4096); + } + } virt+=4096; } } else virt+=4096*1024; } + + vmem_add_remap(dir,fb_addr,VMEM_FRAMEBUFFER,VMEM_FRAMEBUFFER_PAGES,true);//32megs should be enough for 4k (think about pitch) + return dir; } |