From: Joshua Wise Date: Thu, 4 Sep 2008 01:15:38 +0000 (-0400) Subject: initial import X-Git-Url: http://git.joshuawise.com/netwatch.git/commitdiff_plain/90d089658f499e24ae10840352b548ddbb842a9e?ds=inline initial import --- 90d089658f499e24ae10840352b548ddbb842a9e diff --git a/ich2/Makefile b/ich2/Makefile new file mode 100644 index 0000000..b90bc02 --- /dev/null +++ b/ich2/Makefile @@ -0,0 +1,2 @@ +smm-open-ich2: + gcc -o smm-open-ich2 smm-open-ich2.c ../pci/pci-linux.c diff --git a/ich2/reg-82815.h b/ich2/reg-82815.h new file mode 100644 index 0000000..3f792e0 --- /dev/null +++ b/ich2/reg-82815.h @@ -0,0 +1,13 @@ +#ifndef _REG_82815_H +#define _REG_82815_H + +#define DRP 0x52 +#define DRP2 0x54 + +#define SMRAMC 0x70 +#define SMRAMC_LOCK 0x02 +#define SMRAMC_LSMM 0x0C +#define SMRAMC_USMM 0x30 +#define SMRAMC_GMS 0xC0 + +#endif diff --git a/ich2/smm-open-ich2.c b/ich2/smm-open-ich2.c new file mode 100644 index 0000000..9c80dae --- /dev/null +++ b/ich2/smm-open-ich2.c @@ -0,0 +1,80 @@ +#include "reg-82815.h" + +unsigned long memsz[] = { + 0, // 0 + 32*1024*1024, // 1 + 32*1024*1024, // 2 + 48*1024*1024, // 3 + 64*1024*1024, // 4 + 64*1024*1024, // 5 + 96*1024*1024, // 6 + 128*1024*1024, // 7 + 128*1024*1024, // 8 + 128*1024*1024, // 9 + 128*1024*1024, // A + 192*1024*1024, // B + 256*1024*1024, // C + 256*1024*1024, // D + 256*1024*1024, // E + 512*1024*1024 // F +}; + +int main() +{ + unsigned char smramc, drp, drp2; + unsigned int tom = 0; + int usmm, lsmm; + + smramc = pci_read8(0, 0, 0, SMRAMC); + drp = pci_read8(0, 0, 0, DRP); + drp2 = pci_read8(0, 0, 0, DRP2); + + tom += memsz[drp & 0xF]; + tom += memsz[drp >> 4]; + tom += memsz[drp2 & 0xF]; + + printf("Top of DRAM: %08x\n", tom); + + printf("SMRAMC: %02x\n", smramc); + if (smramc & SMRAMC_LOCK) + { + printf("SMRAM is locked, cannot load anything :-(\n"); + return 1; + } + + usmm = (smramc >> 4) & 0x3; + lsmm = (smramc >> 2) & 0x3; + + switch (usmm) + { + case 0: + printf("TSEG and HSEG both off\n"); + break; + case 1: + printf("TSEG off, HSEG %s\n", lsmm ? "off" : "on"); + break; + case 2: + printf("TSEG 512KB (%08x - %08x), HSEG %s\n", tom - 512 * 1024, tom - 1, lsmm ? "off" : "on"); + break; + case 3: + printf("TSEG 1MB (%08x - %08x), HSEG %s\n", tom - 1 * 1024 * 1024, tom - 1, lsmm ? "off" : "on"); + break; + } + + switch (lsmm) + { + case 0: + printf("ABSEG disabled\n"); + break; + case 1: + printf("ABSEG enabled as system RAM\n"); + break; + case 2: + printf("ABSEG enabled for SMM code only\n"); + break; + case 3: + printf("ABSEG enabled for both SMM code and data\n"); + break; + } + return 0; +} diff --git a/ich7/reg-82865.h b/ich7/reg-82865.h new file mode 100644 index 0000000..9c3d3df --- /dev/null +++ b/ich7/reg-82865.h @@ -0,0 +1,16 @@ +#ifndef _REG_82865_H +#define _REG_82865_H + +#define SMRAMC 0x9D +#define SMRAMC_ENABLE 0x8 +#define SMRAMC_LOCK 0x10 +#define SMRAMC_CLOSE 0x20 +#define SMRAMC_OPEN 0x40 +#define ESMRAMC 0x9E +#define ESMRAMC_TSEGEN 0x1 +#define ESMRAMC_TSEGSZ 0x6 +#define ESMRAMC_SMERR 0x40 +#define ESMRAMC_HISMRAM 0x80 + + +#endif diff --git a/ich7/smm-open-ich7.c b/ich7/smm-open-ich7.c new file mode 100644 index 0000000..d53a6bd --- /dev/null +++ b/ich7/smm-open-ich7.c @@ -0,0 +1,21 @@ +#include "reg-82865.h" + +void main() +{ + unsigned char smramc, esmramc; + unsigned int toud; + + smramc = pci_read8(0, 0, 0, SMRAMC); + esmramc = pci_read8(0, 0, 0, ESMRAMC); + + toud = (pci_read16(0, 0, 0, 0xC4) >> 3) << 19; + printf("Usable DRAM: %d bytes\n", toud); + + printf("SMRAMC: %02x\n", smramc); + printf("ESMRAMC: %02x\n", smramc); + if (smramc & SMRAMC_LOCK) + { + printf("SMRAM is locked, cannot load anything :-(\n"); + return; + } +} \ No newline at end of file diff --git a/pci/pci-linux.c b/pci/pci-linux.c new file mode 100644 index 0000000..11c2375 --- /dev/null +++ b/pci/pci-linux.c @@ -0,0 +1,101 @@ +#include +#include +#include +#include +#include + +static int _open(int bus, int slot, int fn) +{ + char fname[512]; + + sprintf(fname, "/proc/bus/pci/%02x/%02x.%01x", bus, slot, fn); + return open(fname, O_RDWR); +} + +void pci_write32(int bus, int slot, int fn, int addr, uint32_t data) +{ + int fd; + + fd = _open(bus, slot, fn); + if (fd < 0) + return; + lseek(fd, addr, SEEK_SET); + write(fd, &data, 4); + close(fd); +} + +void pci_write16(int bus, int slot, int fn, int addr, uint16_t data) +{ + int fd; + + fd = _open(bus, slot, fn); + if (fd < 0) + return; + lseek(fd, addr, SEEK_SET); + write(fd, &data, 2); + close(fd); +} + +void pci_write8(int bus, int slot, int fn, int addr, uint8_t data) +{ + int fd; + + fd = _open(bus, slot, fn); + if (fd < 0) + return; + lseek(fd, addr, SEEK_SET); + write(fd, &data, 1); + close(fd); +} + +uint32_t pci_read32(int bus, int slot, int fn, int addr) +{ + int fd; + uint32_t data; + + fd = _open(bus, slot, fn); + if (fd < 0) + return; + lseek(fd, addr, SEEK_SET); + read(fd, &data, 4); + close(fd); + + return data; +} + +uint16_t pci_read16(int bus, int slot, int fn, int addr) +{ + int fd; + uint16_t data; + + fd = _open(bus, slot, fn); + if (fd < 0) + { + perror("open"); + return; + } + lseek(fd, addr, SEEK_SET); + read(fd, &data, 2); + close(fd); + + return data; +} + + +uint8_t pci_read8(int bus, int slot, int fn, int addr) +{ + int fd; + uint8_t data; + + fd = _open(bus, slot, fn); + if (fd < 0) + { + perror("open"); + return; + } + lseek(fd, addr, SEEK_SET); + read(fd, &data, 1); + close(fd); + + return data; +}