From: Joshua Wise Date: Tue, 11 Nov 2008 22:38:22 +0000 (-0500) Subject: Hit paging to clean it up a bit. Add a reboot button. X-Git-Url: http://git.joshuawise.com/netwatch.git/commitdiff_plain/923ea2c2cd9df7f02ddcfd8c543f63b76be44660?ds=inline;hp=-c Hit paging to clean it up a bit. Add a reboot button. --- 923ea2c2cd9df7f02ddcfd8c543f63b76be44660 diff --git a/aseg-paging/Makefile b/aseg-paging/Makefile index 2a50935..9117d9d 100644 --- a/aseg-paging/Makefile +++ b/aseg-paging/Makefile @@ -48,7 +48,6 @@ OBJS = ../ich2/smi.o \ ../lib/sprintf.o \ ../lib/console.o \ ../lib/serial.o \ - ../lib/paging.o \ ../aseg/keyboard.o \ ../aseg/packet.o \ $(LWIP_OBJS) \ diff --git a/aseg-paging/pagingstub.c b/aseg-paging/pagingstub.c index 0115713..161dc1f 100644 --- a/aseg-paging/pagingstub.c +++ b/aseg-paging/pagingstub.c @@ -5,6 +5,7 @@ #include #include #include +#include #include "traps.h" #include "../net/net.h" #include "vga-overlay.h" @@ -12,12 +13,10 @@ extern void smi_init(); #include "vm_flags.h" +extern void smi_entry(); void set_cr0(unsigned int); void ps_switch_stack (void (*call)(), int stack); -extern int entry_initialized; -extern int _bss, _bssend, _end; -void smi_entry(); #define get_cr0() \ ({ \ register unsigned int _temp__; \ @@ -35,107 +34,135 @@ void smi_entry(); #define MAP_FLAGS (PTE_PRESENT | PTE_READ_WRITE) -void * pt_setup(int smbase, int tseg_start, int tseg_size) { +static int initialized = 0; +static int paging_enb = 0; +static unsigned long *pd; + +extern int _bss, _bssend, _end; + +unsigned long v2p(void *virt) +{ + unsigned long _virt = (unsigned long)virt; + + if (!paging_enb) + return _virt; + + if (_virt >= 0xA0000 && _virt < 0xC0000) + return _virt; + if (_virt >= 0x200000 && _virt < 0x300000) + return _virt - 0x200000 + /* XXX */ 0x1FF82000; + outputf("WARNING: v2p(%08x)", _virt); + return 0xFFFFFFFF; +} + +void *p2v(unsigned long phys) +{ + if (!paging_enb) + return (void*)phys; + + if (phys >= 0xA0000 && phys < 0xC0000) + return (void*)phys; + if (phys >= 0x1FF80000 && phys < 0x20000000) + return (void*)(phys - 0x1FF82000 + 0x200000); + outputf("WARNING: p2v(%08x)", phys); + return (void *)0xFFFFFFFF; +} + + +inline int pt_addmap(unsigned long *pd, unsigned long vaddr, unsigned long paddr) +{ + unsigned long pde = ((unsigned long *)p2v((unsigned long)pd))[PDE_FOR(vaddr)]; + unsigned long *pt; + + if (!(pde & PTE_PRESENT)) + return -1; + + pt = (unsigned long *)p2v(ADDR_12_MASK(pde)); + pt[PTE_FOR(vaddr)] = paddr | PTE_PRESENT | PTE_READ_WRITE; + + return 0; +} + +static void * pt_setup(int tseg_start, int tseg_size) { int i; - outb(0x80, 0x51); - /* The page directory and page table live at SMBASE and SMBASE + 0x1000, - * respectively; clear them. */ - int * pagedirectory = (int *) tseg_start; - int * pagetable = (int *) (tseg_start + 0x1000); + /* The page directory and page table live at TSEG and TSEG + 0x1000, + * respectively. */ + unsigned long *pagedirectory = (unsigned long *) tseg_start; + unsigned long *pagetable = (unsigned long *) (tseg_start + 0x1000); /* Clear out the page directory except for one entry pointing to the * page table, and clear the page table entirely. */ - outb(0x80, 0x52); pagedirectory[0] = (tseg_start + 0x1000) | PTE_PRESENT | PTE_READ_WRITE; - outb(0x80, 0x53); for (i = 1; i < 1024; i++) - { pagedirectory[i] = 0; - } - outb(0x80, 0x54); for (i = 0; i < 1024; i++) - { pagetable[i] = 0; - } - outb(0x80, 0x55); - - /* The page at 0x10000 - 0x10FFF points to the SMI entry point, - * SMBASE + 0x8000. */ - pagetable[16] = (0x8000 + smbase) | MAP_FLAGS; - - /* 0x11000 to 0x1EFFF map to the rest of ASEG up to SMBASE + 0xF000; - * the page containing the saved state is not mappped to our code - * region. */ - - for (i = 0; i < 8; i++) - { - pagetable[17 + i] = (i * 0x1000 + smbase) | MAP_FLAGS; - } - - for (i = 0; i < 6; i++) - { - pagetable[25 + i] = (smbase + 0x9000 + i * 0x1000) | MAP_FLAGS; - } - - outb(0x80, 0x56); - /* Map 0xA8000 to itself. */ - for (i = 0; i < 32; i++) { - pagetable[0xA0 + i] = (0xA0000 + i * 0x1000) | MAP_FLAGS; - } + /* Map 0x0A0000:0x0BFFFF to itself. */ + for (i = 0; i < 32; i++) + pt_addmap(pagedirectory, 0xA0000 + i * 0x1000, 0xA0000 + i * 0x1000); - /* Map 0x200000 to TSEG */ - for (i = 0; i < 128; i++) { - pagetable[0x200 + i] = (tseg_start + 0x2000 + i * 0x1000) | MAP_FLAGS; - } + /* Map 0x200000:0x300000 to TSEG */ + for (i = 0; i < 256; i++) + pt_addmap(pagedirectory, 0x200000 + i * 0x1000, tseg_start + 0x2000 + i * 0x1000); - /* Map 0x300000 -> 0x200000, so we can copy our code out of + /* Map 0x300000:0x400000 to 0x200000, so we can copy our code out of * RAM the first time around */ - for (i = 0; i < 256; i++) { - pagetable[0x300 + i] = (0x200000 + i * 0x1000) | MAP_FLAGS; - } + for (i = 0; i < 256; i++) + pt_addmap(pagedirectory, 0x300000 + i * 0x1000, 0x200000 + i * 0x1000); - outb(0x80, 0x57); return pagedirectory; } void c_entry(void) { - unsigned char *bp; + paging_enb = 0; - outb(0x80, 0x41); - if (!entry_initialized) - pt_setup(0xA0000, 0x1FF80000, 0x80000); + outb(0x80, 0x01); + if (!initialized) + pd = pt_setup(0x1FF80000, 0x80000); + outb(0x80, 0x02); /* Enable paging. */ - outb(0x80, 0x42); - set_cr3(0x1FF80000); + set_cr3((unsigned long)pd); set_cr0(get_cr0() | CR0_PG); - - outb(0x80, 0x43); + outb(0x80, 0x03); + paging_enb = 1; - if (!entry_initialized) { + /* If this is the first goround, copy in data. */ + if (!initialized) + { + unsigned char *p; + + outb(0x80, 0x04); + for (p = (void *)0x200000; (void *)p < (void *)&_bss; p++) + *p = *(p + 0x100000); + for (p = (void *)&_bss; (void *)p < (void *)&_bssend; p++) + *p = 0; + outb(0x80, 0x05); - /* If needed, copy in data. */ - for (bp = (void *)0x200000; (void *)bp < (void *)&_bss; bp++) - *bp = *(bp + 0x100000); - for (bp = (void *)&_bss; (void *)bp < (void *)&_bssend; bp++) - *bp = 0; + /* Only now is it safe to call other functions. */ serial_init(); - dolog("Paging enabled."); + dolog("Evacuation to TSEG complete."); } + + outb(0x80, 0x06); traps_install(); + + outb(0x80, 0x07); - if (!entry_initialized) { - smi_init(); + if (!initialized) + { + smi_init(); /* Run the firstrun. */ + outb(0x80, 0x08); - entry_initialized = 1; + initialized = 1; } - - outb(0x80, 0x44); + + outb(0x80, 0x09); ps_switch_stack(smi_entry, 0x270000); outb(0x80, 0xFA); } diff --git a/aseg-paging/traps.c b/aseg-paging/traps.c index 8184bdb..f41068f 100644 --- a/aseg-paging/traps.c +++ b/aseg-paging/traps.c @@ -92,7 +92,7 @@ void traps_install(void) { struct pseudo_descriptor pdesc; pdesc.limit = sizeof(idt) - 1; - pdesc.linear_base = memory_v2p(&idt); + pdesc.linear_base = v2p(&idt); WRAPPER_INSTALL(idt, TRAP, fault_divide, T_DIVIDE_ERROR); WRAPPER_INSTALL(idt, TRAP, fault_gp, T_GENERAL_PROTECTION); diff --git a/aseg-paging/vm_flags.h b/aseg-paging/vm_flags.h index d89c9a8..f003516 100644 --- a/aseg-paging/vm_flags.h +++ b/aseg-paging/vm_flags.h @@ -8,6 +8,13 @@ #ifndef _VM_FLAGS_H #define _VM_FLAGS_H +#define PTE_FOR(x) (((unsigned int)(x) >> 12) & 0x3FF) +#define PDE_FOR(x) ((unsigned int)(x) >> 22) +#define ADDR_12_MASK(x) ((unsigned int)(x) & ~((1 << 12) - 1)) +#define ADDR_22_MASK(x) ((unsigned int)(x) & ~((1 << 22) - 1)) +#define LOWER_12(x) ((unsigned int)(x) & ((1 << 12) - 1)) +#define LOWER_22(x) ((unsigned int)(x) & ((1 << 22) - 1)) + #define PDE_4M_ADDR_SHIFT 22 #define PTE_4K_ADDR_SHIFT 12 #define PDE_TABLE_ADDR_SHIFT 12 diff --git a/include/paging.h b/include/paging.h index 69c12eb..fb74a0d 100644 --- a/include/paging.h +++ b/include/paging.h @@ -1,7 +1,7 @@ #ifndef __PAGING_H #define __PAGING_H -extern unsigned long memory_v2p(void *virt); -extern void *memory_p2v(unsigned long phys); +extern unsigned long v2p(void *virt); +extern void *p2v(unsigned long phys); #endif diff --git a/lib/paging.c b/lib/paging.c deleted file mode 100644 index fc54983..0000000 --- a/lib/paging.c +++ /dev/null @@ -1,24 +0,0 @@ -#include -#include - -unsigned long memory_v2p(void *virt) -{ - unsigned long _virt = (unsigned long)virt; - - if (_virt >= 0xA0000 && _virt < 0xC0000) - return _virt; - if (_virt >= 0x200000 && _virt < 0x300000) - return _virt - 0x200000 + /* XXX */ 0x1FF82000; - outputf("WARNING: v2p(%08x)", _virt); - return 0xFFFFFFFF; -} - -void *memory_p2v(unsigned long phys) -{ - if (phys >= 0xA0000 && phys < 0xC0000) - return (void*)phys; - if (phys >= 0x1FF80000 && phys < 0x20000000) - return (void*)(phys - 0x1FF82000 + 0x200000); - outputf("WARNING: p2v(%08x)", phys); - return (void *)0xFFFFFFFF; -} diff --git a/net/3c90x.c b/net/3c90x.c index a9d15df..40edafe 100644 --- a/net/3c90x.c +++ b/net/3c90x.c @@ -489,11 +489,11 @@ a3c90x_transmit(unsigned int size, const char *pkt) INF_3C90X.TransmitDPD.DnNextPtr = 0; /** set notification for transmission completion (bit 15) **/ INF_3C90X.TransmitDPD.FrameStartHeader = (size) | 0x8000; - INF_3C90X.TransmitDPD.DataAddr = memory_v2p((void*)pkt); + INF_3C90X.TransmitDPD.DataAddr = v2p((void*)pkt); INF_3C90X.TransmitDPD.DataLength = size + (1<<31); /** Send the packet **/ - outl(INF_3C90X.IOAddr + regDnListPtr_l, memory_v2p(&(INF_3C90X.TransmitDPD))); + outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&(INF_3C90X.TransmitDPD))); _issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */); oneshot_start_ms(100); @@ -578,11 +578,11 @@ a3c90x_poll(struct nic *nic, int retrieve) /** Build the up-load descriptor **/ INF_3C90X.ReceiveUPD.UpNextPtr = 0; INF_3C90X.ReceiveUPD.UpPktStatus = 0; - INF_3C90X.ReceiveUPD.DataAddr = memory_v2p(nic->packet); + INF_3C90X.ReceiveUPD.DataAddr = v2p(nic->packet); INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31); /** Submit the upload descriptor to the NIC **/ - _outl(memory_v2p(&(INF_3C90X.ReceiveUPD)), + _outl(v2p(&(INF_3C90X.ReceiveUPD)), INF_3C90X.IOAddr + regUpListPtr_l); /** Wait for upload completion (upComplete(15) or upError (14)) **/ diff --git a/net/http/fs.c b/net/http/fs.c index 9e6358d..54c5bd9 100644 --- a/net/http/fs.c +++ b/net/http/fs.c @@ -33,10 +33,11 @@ #include "fs.h" #include "fsdata.h" #include "fsdata.c" +#include /*-----------------------------------------------------------------------------------*/ -void fill_regs(struct fs_file *file) +void handle_regs(struct fs_file *file) { static unsigned char buf[2048]; @@ -63,7 +64,14 @@ void fill_regs(struct fs_file *file) file->data = buf; - file->len = strlen(buf); + file->len = strlen(buf)-1; +} + +void handle_reboot(struct fs_file *file) +{ + outb(0xCF9, 0x4); + file->data = "So long!"; + file->len = 8; } @@ -76,7 +84,12 @@ fs_open(const char *name, struct fs_file *file) /* /registers.html is CGI */ if (!strcmp(name, "/registers.html")) { - fill_regs(file); + handle_regs(file); + return 1; + } + if (!strcmp(name, "/reboot")) + { + handle_reboot(file); return 1; } @@ -85,7 +98,7 @@ fs_open(const char *name, struct fs_file *file) f = f->next) { if (!strcmp(name, (const char*)f->name)) { file->data = f->data; - file->len = f->len; + file->len = f->len-1; return 1; } } diff --git a/net/http/fsdata.c b/net/http/fsdata.c index 7e70023..57180f3 100644 --- a/net/http/fsdata.c +++ b/net/http/fsdata.c @@ -5,7 +5,7 @@ static const unsigned char data_404_html[] = static const unsigned char data_index_html[] = "NetWatch" - "

NetWatch

" ""; const struct fsdata_file file_404_html[] = {{NULL, "/404.html", data_404_html, sizeof(data_404_html)}};