initial import

diff --git a/ich2/Makefile b/ich2/Makefile
new file mode 100644 (file)
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 (file)
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 (file)
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 (file)
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 (file)
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 (file)
index 0000000..11c2375
--- /dev/null
+++ b/pci/pci-linux.c
@@ -0,0 +1,101 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <inttypes.h>
+
+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;
+}