git: 9front

Download patch

ref: 832257141e94b14dddb28007ea8999131bc06305
parent: 4e487c8ad0d09dc0ac834319a848874ce2baa545
author: aiju <aiju@phicode.de>
date: Fri Aug 24 14:49:25 EDT 2012 

added aux/cpuid


--- /dev/null
+++ b/sys/src/cmd/aux/cpuid.c
@@ -1,0 +1,208 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+
+#define CUT(x, a, b) (((x)&((1<<(b))-1))>>(a))
+
+typedef struct Res {
+	ulong ax, bx, cx, dx;
+} Res;
+
+Biobuf *out;
+
+uchar _cpuid[] = {
+	0x8B, 0x44, 0x24, 0x08,    /* MOV 8(SP), AX */
+	0x31, 0xDB,                /* XOR BX, BX */
+	0x8B, 0x4C, 0x24, 0x0C,    /* MOV 12(SP), CX */ 
+	0x31, 0xD2,                /* XOR DX, DX */
+	0x0F, 0xA2,                /* CPUID */
+	0x8B, 0x7C, 0x24, 0x04,    /* MOV 4(SP), DI */
+	0x89, 0x07,                /* MOV AX, (DI) */
+	0x89, 0x5F, 0x04,          /* MOV BX, 4(DI) */
+	0x89, 0x4F, 0x08,          /* MOV CX, 8(DI) */
+	0x89, 0x57, 0x0C,          /* MOV DX, 12(DI) */
+	0xC3                       /* RET */
+};
+
+Res (*cpuid)(ulong ax, ulong cx) = (Res(*)(ulong, ulong)) _cpuid;
+
+void
+func0(ulong)
+{
+	Res r;
+	char buf[13];
+	
+	r = cpuid(0, 0);
+	((ulong *) buf)[0] = r.bx;
+	((ulong *) buf)[1] = r.dx;
+	((ulong *) buf)[2] = r.cx;
+	buf[13] = 0;
+	Bprint(out, "vendor %s\n", buf);
+}
+
+void
+printbits(char *id, ulong x, char **s)
+{
+	int i, j;
+	
+	for(i = 0, j = 0; i < 32; i++)
+		if((x & (1<<i)) != 0 && s[i] != nil){
+			if(j++ % 16 == 0){
+				if(j != 1)
+					Bprint(out, "\n");
+				Bprint(out, "%s ", id);
+			}
+			Bprint(out, "%s ", s[i]);
+		}
+	if(j % 16 != 0)
+		Bprint(out, "\n");
+}
+
+void
+func1(ulong)
+{
+	Res r;
+	static char *bitsdx[32] = {
+		"fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", "cx8", "apic",
+		nil, "sep", "mtrr", "pge", "mca", "cmov", "pat", "pse36", "pn", "clflush",
+		nil, "dts", "acpi", "mmx", "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
+	};
+	static char *bitscx[32] = {
+		"pni", "pclmulqdq", "dtes64", "monitor", "ds_cpl", "vmx", "smx", "est", "tm2", "ssse3",
+		"cid", nil, "fma", "cx16", "xtpr", "pdcm", nil, "pcid", "dca", "sse4_1", "sse4_2", "x2apic",
+		"movbe", "popcnt", "tscdeadline", "aes", "xsave", "osxsave", "avx", 
+		"f16c", "rdrnd", "hypervisor"
+	};
+	
+	r = cpuid(1, 0);
+	Bprint(out, "procmodel %.8ulx / %.8ulx\n", r.ax, r.bx);
+	printbits("features", r.dx, bitsdx);
+	printbits("features", r.cx, bitscx);
+}
+
+void
+extfunc1(ulong ax)
+{
+	Res r;
+	static char *bitsdx[32] = {
+		"fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", "cx8", "apic", "sep", "mtrr", "pge",
+		"mca", "cmov", "pat", "fcmov", "pse36", nil, "mp", "nx", nil, "mmx+", "mmx", nil,
+		"ffxsr", "pg1g", "tscp", nil, "lm", "3dnow!+", "3dnow"
+	};
+	static char *bitscx[32] = {
+		"ahf64", "cmp", "svm", "eas", "cr8d", "lzcnt", "sse4a", "msse", "3dnow!p", "osvw", "ibs",
+		"xop", "skinit", "wdt", nil, "lwp", "fma4", "tce", nil, "nodeid", nil, "tbm", "topx",
+		"pcx_core", "pcx_nb",
+	};
+	
+	r = cpuid(ax, 0);
+	Bprint(out, "extmodel %.8ulx / %.8ulx\n", r.ax, r.bx);
+	printbits("extfeatures", r.dx, bitsdx);
+	printbits("extfeatures", r.cx, bitscx);
+}
+
+void
+extfunc2(ulong ax)
+{
+	char buf[49];
+	int i;
+	Res r;
+	char *p;
+
+	if(ax != 0x80000004)
+		return;
+	buf[48] = 0;
+	for(i = 0; i < 3; i++){
+		r = cpuid(0x80000002 + i, 0);
+		((ulong *) buf)[4 * i + 0] = r.ax;
+		((ulong *) buf)[4 * i + 1] = r.bx;
+		((ulong *) buf)[4 * i + 2] = r.cx;
+		((ulong *) buf)[4 * i + 3] = r.dx;
+	}
+	p = buf;
+	while(*p == ' ')
+		p++;
+	Bprint(out, "procname %s\n", p);
+}
+
+void
+extfunc8(ulong ax)
+{
+	Res r;
+	
+	r = cpuid(ax, 0);
+	Bprint(out, "physbits %uld\n", CUT(r.ax, 0, 7));
+	Bprint(out, "virtbits %uld\n", CUT(r.ax, 8, 15));
+	if(CUT(r.ax, 16, 23) != 0)
+		Bprint(out, "guestbits %uld\n", CUT(r.ax, 16, 23));
+}
+
+void (*funcs[])(ulong) = {
+	[0] func0,
+	[1] func1,
+};
+
+void (*extfuncs[])(ulong) = {
+	[1] extfunc1,
+	[2] extfunc2,
+	[3] extfunc2,
+	[4] extfunc2,
+	[8] extfunc8,
+};
+
+void
+stdfunc(ulong ax)
+{
+	Res r;
+	
+	r = cpuid(ax, 0);
+	Bprint(out, "%.8ulx %.8ulx %.8ulx %.8ulx %.8ulx\n", ax, r.ax, r.bx, r.cx, r.dx);
+}
+
+char Egreg[] = "this information is classified";
+
+void
+notehand(void *, char *s)
+{
+	if(strncmp(s, "sys:", 4) == 0)
+		sysfatal(Egreg);
+	noted(NDFLT);
+}
+
+void
+main(int argc, char **argv)
+{
+	Res r;
+	int i, rflag, aflag;
+	ulong w;
+	static Biobuf buf;
+	
+	rflag = aflag = 0;
+	ARGBEGIN {
+	case 'r': rflag++; break;
+	case 'a': aflag++; break;
+	} ARGEND;
+	notify(notehand);
+	w = *(ulong *)0x1000;
+	notify(nil);
+	if(w != 0xeb010000)
+		sysfatal(Egreg);
+	Binit(&buf, 1, OWRITE);
+	out = &buf;
+	r = cpuid(0, 0);
+	for(i = 0; i <= r.ax; i++)
+		if(i >= nelem(funcs) || funcs[i] == nil || rflag){
+			if(rflag || aflag)
+				stdfunc(i);
+		}else
+			funcs[i](i);
+	r = cpuid(0x80000000, 0);
+	r.ax -= 0x80000000;
+	for(i = 0; i <= r.ax; i++)
+		if(i >= nelem(extfuncs) || extfuncs[i] == nil || rflag){
+			if(rflag || aflag)
+				stdfunc(0x80000000 | i);
+		}else
+			extfuncs[i](0x80000000 | i);
+	Bterm(out);
+}
--- a/sys/src/cmd/aux/mkfile
+++ b/sys/src/cmd/aux/mkfile
@@ -11,6 +11,7 @@
 	cddb\
 	cdsh\
 	clog\
+	cpuid\
 	consolefs\
 	data2s\
 	depend\
-- 
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