From 0889f342f13f65b875e67f78a27ad078f3f55736 Mon Sep 17 00:00:00 2001
From: Jacob Potter <jdpotter@andrew.cmu.edu>
Date: Thu, 25 Sep 2008 21:39:37 -0400
Subject: [PATCH] add poke-rls tool

---
 tools/Makefile       |  8 +++++++-
 tools/poke-rls-asm.S | 20 ++++++++++++++++++++
 tools/poke-rls.c     | 31 +++++++++++++++++++++++++++++++
 3 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 tools/poke-rls-asm.S
 create mode 100644 tools/poke-rls.c

diff --git a/tools/Makefile b/tools/Makefile
index c53fd4a..3bd46a5 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -2,8 +2,9 @@ CFLAGS=-I../include
 CC=gcc
 SMRAM_ICH2_OBJS=smram-linux-tool.o ../pci/pci-linux.o ../ich2/smram-ich2.noraw.o
 PCI_OBJS=pci.o ../pci/pci-linux.o
+POKE_RLS_OBJS=poke-rls.o poke-rls-asm.o ../pci/pci-linux.o
 
-all: smram-ich2 port pci
+all: smram-ich2 port pci poke-rls
 
 %.noraw.o: %.c
 	gcc $(CFLAGS) -c -o $@ $<
@@ -17,5 +18,10 @@ port: port.o
 pci: $(PCI_OBJS)
 	gcc $(CFLAGS) -o pci $(PCI_OBJS)
 
+poke-rls: $(POKE_RLS_OBJS)
+	gcc $(CFLAGS) -o poke-rls $(POKE_RLS_OBJS)
+
 clean:
 	rm -f $(SMRAM_ICH2_OBJS) smram-ich2
+
+poke:
diff --git a/tools/poke-rls-asm.S b/tools/poke-rls-asm.S
new file mode 100644
index 0000000..ee44854
--- /dev/null
+++ b/tools/poke-rls-asm.S
@@ -0,0 +1,20 @@
+.global poke
+poke:
+	# Preload registers: $0x1BADD00D
+	mov $0x1BADD00D, %ecx
+
+	# Parameter: I/O port to set bit 2 of
+	mov 4(%esp), %dx
+	inl %dx, %eax
+	or $4, %eax
+	outl %eax, %dx
+
+	# Count down for a while
+	mov $0x10000, %edx
+loop:
+	dec %edx
+	jz loop
+
+	# Maybe SMM poked something?
+	mov %ecx, %eax
+	ret
diff --git a/tools/poke-rls.c b/tools/poke-rls.c
new file mode 100644
index 0000000..c6db7bc
--- /dev/null
+++ b/tools/poke-rls.c
@@ -0,0 +1,31 @@
+#include <sys/io.h>
+#include <reg-82801b.h>
+#include <string.h>
+#include <stdint.h>
+
+static uint16_t _get_PMBASE()
+{
+	static long pmbase = -1;
+
+	if (pmbase == -1) 
+		pmbase = pci_read32(ICH2_LPC_BUS, ICH2_LPC_DEV, ICH2_LPC_FN, ICH2_LPC_PCI_PMBASE) & ICH2_PMBASE_MASK;
+
+	return pmbase;
+}
+
+
+extern unsigned int poke(short addr);
+
+int main(int argc, char **argv)
+{
+	unsigned int res;
+
+	if (iopl(3) < 0)
+	{
+		perror("iopl");
+		return 1;
+	}
+
+	res = poke(_get_PMBASE() + 0x04);
+	printf("found %p\n", res);
+}
-- 
2.43.0