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authorGabe Black <gblack@eecs.umich.edu>2007-10-07 18:10:42 -0700
committerGabe Black <gblack@eecs.umich.edu>2007-10-07 18:10:42 -0700
commit63a6d7376b539d7da7143217f936b4ee4f984b26 (patch)
tree66c8622dbf944dea09a8146f03573d4a803576ee /src
parent304e4c932af494503ead9395eb08dc8fed1efa9f (diff)
downloadgem5-63a6d7376b539d7da7143217f936b4ee4f984b26.tar.xz
X86: Make initCPU and startupCPU do something basic.
--HG-- extra : convert_revision : 1a04f4402f4f31e4e5cd482c7983d853fe117df5
Diffstat (limited to 'src')
-rw-r--r--src/arch/x86/SConscript2
-rw-r--r--src/arch/x86/miscregs.hh3
-rw-r--r--src/arch/x86/utility.cc128
-rw-r--r--src/arch/x86/utility.hh15
4 files changed, 139 insertions, 9 deletions
diff --git a/src/arch/x86/SConscript b/src/arch/x86/SConscript
index 2a14943b0..6d7984147 100644
--- a/src/arch/x86/SConscript
+++ b/src/arch/x86/SConscript
@@ -102,6 +102,7 @@ if env['TARGET_ISA'] == 'x86':
Source('regfile.cc')
Source('remote_gdb.cc')
Source('tlb.cc')
+ Source('utility.cc')
SimObject('X86TLB.py')
@@ -111,7 +112,6 @@ if env['TARGET_ISA'] == 'x86':
# Full-system sources
Source('system.cc')
Source('stacktrace.cc')
- Source('utility.cc')
Source('vtophys.cc')
else:
Source('process.cc')
diff --git a/src/arch/x86/miscregs.hh b/src/arch/x86/miscregs.hh
index 8080bd90b..15932f92c 100644
--- a/src/arch/x86/miscregs.hh
+++ b/src/arch/x86/miscregs.hh
@@ -117,6 +117,9 @@ namespace X86ISA
// Flags register
MISCREG_RFLAGS = MISCREG_DR_BASE + NumDRegs,
+ // Extended feature enable register
+ MISCREG_EFER,
+
// Segment selectors
MISCREG_SEG_SEL_BASE,
MISCREG_ES = MISCREG_SEG_SEL_BASE,
diff --git a/src/arch/x86/utility.cc b/src/arch/x86/utility.cc
index b2532a13e..862d14460 100644
--- a/src/arch/x86/utility.cc
+++ b/src/arch/x86/utility.cc
@@ -55,7 +55,11 @@
* Authors: Gabe Black
*/
+#include "arch/x86/intregs.hh"
+#include "arch/x86/miscregs.hh"
+#include "arch/x86/segmentregs.hh"
#include "arch/x86/utility.hh"
+#include "arch/x86/x86_traits.hh"
namespace X86ISA {
@@ -67,4 +71,128 @@ uint64_t getArgument(ThreadContext *tc, int number, bool fp) {
M5_DUMMY_RETURN
#endif
}
+
+# if FULL_SYSTEM
+void initCPU(ThreadContext *tc, int cpuId)
+{
+ // TODO Figure out what the attribute registers should be set to. How this
+ // information is stored isn't specified, but it's values are in table
+ // 14.2.
+
+ // The otherwise unmodified integer registers should be set to 0.
+ for (int index = 0; index < NUM_INTREGS; index++) {
+ tc->setIntReg(index, 0);
+ }
+
+ // These next two loops zero internal microcode and implicit registers.
+ // They aren't specified by the ISA but are used internally by M5's
+ // implementation.
+ for (int index = 0; index < NumMicroIntRegs; index++) {
+ tc->setIntReg(INTREG_MICRO(index), 0);
+ }
+
+ for (int index = 0; index < NumImplicitIntRegs; index++) {
+ tc->setIntReg(INTREG_IMPLICIT(index), 0);
+ }
+
+ // Set integer register EAX to 0 to indicate that the optional BIST
+ // passed. No BIST actually runs, but software may still check this
+ // register for errors.
+ tc->setIntReg(INTREG_RAX, 0);
+
+ //The following values are dictated by the architecture for after a RESET#
+ tc->setMiscReg(MISCREG_CR0, 0x0000000060000010);
+ tc->setMiscReg(MISCREG_CR2, 0);
+ tc->setMiscReg(MISCREG_CR3, 0);
+ tc->setMiscReg(MISCREG_CR4, 0);
+ tc->setMiscReg(MISCREG_CR8, 0);
+
+ tc->setMiscReg(MISCREG_RFLAGS, 0x0000000000000002);
+
+ tc->setMiscReg(MISCREG_EFER, 0);
+
+ for (int seg = 0; seg != NUM_SEGMENTREGS; seg++) {
+ tc->setMiscReg(MISCREG_SEG_SEL(seg), 0);
+ tc->setMiscReg(MISCREG_SEG_BASE(seg), 0);
+ tc->setMiscReg(MISCREG_SEG_LIMIT(seg), 0xffff);
+ tc->setMiscReg(MISCREG_SEG_ATTR(seg), 0);
+ }
+
+ tc->setMiscReg(MISCREG_CS, 0xf000);
+ tc->setMiscReg(MISCREG_CS_BASE, 0x00000000ffff0000);
+ // This has the base value pre-added.
+ tc->setMiscReg(MISCREG_CS_LIMIT, 0xffffffff);
+ tc->setMiscReg(MISCREG_CS_ATTR, 0);
+
+ tc->setPC(0x000000000000fff0 +
+ tc->readMiscReg(MISCREG_CS_BASE));
+ tc->setNextPC(tc->readPC() + sizeof(MachInst));
+
+ tc->setMiscReg(MISCREG_GDTR_BASE, 0);
+ tc->setMiscReg(MISCREG_GDTR_LIMIT, 0xffff);
+
+ tc->setMiscReg(MISCREG_IDTR_BASE, 0);
+ tc->setMiscReg(MISCREG_IDTR_LIMIT, 0xffff);
+
+ tc->setMiscReg(MISCREG_LDTR, 0);
+ tc->setMiscReg(MISCREG_LDTR_BASE, 0);
+ tc->setMiscReg(MISCREG_LDTR_LIMIT, 0xffff);
+ tc->setMiscReg(MISCREG_LDTR_ATTR, 0);
+
+ tc->setMiscReg(MISCREG_TR, 0);
+ tc->setMiscReg(MISCREG_TR_BASE, 0);
+ tc->setMiscReg(MISCREG_TR_LIMIT, 0xffff);
+ tc->setMiscReg(MISCREG_TR_ATTR, 0);
+
+ // This value should be the family/model/stepping of the processor.
+ // (page 418). It should be consistent with the value from CPUID, but the
+ // actual value probably doesn't matter much.
+ tc->setIntReg(INTREG_RDX, 0);
+
+ // TODO initialize x87, 64 bit, and 128 bit media state
+
+ // TODO Set up MTRRs (page 512)
+
+ // TODO Set up machine check registers (page 515)
+
+ tc->setMiscReg(MISCREG_DR0, 0);
+ tc->setMiscReg(MISCREG_DR1, 0);
+ tc->setMiscReg(MISCREG_DR2, 0);
+ tc->setMiscReg(MISCREG_DR3, 0);
+
+ tc->setMiscReg(MISCREG_DR6, 0x00000000ffff0ff0);
+ tc->setMiscReg(MISCREG_DR7, 0x0000000000000400);
+
+ // TODO Set time stamp counter to 0
+
+ // TODO Set up performance monitoring registers (page 517)
+
+ // TODO Set up the rest of the MSRs (page 507)
+
+ // Invalidate the caches (this should already be done for us)
+
+ // TODO Turn on the APIC. This should be handled elsewhere but it isn't
+ // currently being handled at all.
+
+ // Set the SMRAM base address (SMBASE) to 0x00030000
+}
+
+#endif
+
+void startupCPU(ThreadContext *tc, int cpuId)
+{
+ if (cpuId == 0) {
+ // This is the boot strap processor (BSP). Initialize it to look like
+ // the boot loader has just turned control over to the 64 bit OS.
+
+ // Enable paging, turn on long mode, etc.
+
+ tc->activate(0);
+ } else {
+ // This is an application processor (AP). It should be initialized to
+ // look like only the BIOS POST has run on it and put then put it into
+ // a halted state.
+ }
+}
+
} //namespace X86_ISA
diff --git a/src/arch/x86/utility.hh b/src/arch/x86/utility.hh
index 9497986e6..477a76e0b 100644
--- a/src/arch/x86/utility.hh
+++ b/src/arch/x86/utility.hh
@@ -61,6 +61,7 @@
#include "arch/x86/types.hh"
#include "base/hashmap.hh"
#include "base/misc.hh"
+#include "config/full_system.hh"
#include "cpu/thread_context.hh"
#include "sim/host.hh"
@@ -140,15 +141,13 @@ namespace X86ISA
template <class TC>
void zeroRegisters(TC *tc);
- inline void initCPU(ThreadContext *tc, int cpuId)
- {
- panic("initCPU not implemented!\n");
- }
+#if FULL_SYSTEM
- inline void startupCPU(ThreadContext *tc, int cpuId)
- {
- tc->activate(0);
- }
+ void initCPU(ThreadContext *tc, int cpuId);
+
+#endif
+
+ void startupCPU(ThreadContext *tc, int cpuId);
};
#endif // __ARCH_X86_UTILITY_HH__