[bios] Allow librm to be compiled for x86_64

This commit does not make librm functional for x86_64; it merely
allows it to compile without errors.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/include/librm.h

@@ -173,17 +173,24 @@ extern uint16_t __text16 ( rm_ds );
 extern uint16_t copy_user_to_rm_stack ( userptr_t data, size_t size );
 extern void remove_user_from_rm_stack ( userptr_t data, size_t size );
 
+/* CODE_DEFAULT: restore default .code32/.code64 directive */
+#ifdef __x86_64__
+#define CODE_DEFAULT ".code64"
+#else
+#define CODE_DEFAULT ".code32"
+#endif
+
 /* TEXT16_CODE: declare a fragment of code that resides in .text16 */
 #define TEXT16_CODE( asm_code_str )			\
 	".section \".text16\", \"ax\", @progbits\n\t"	\
 	".code16\n\t"					\
 	asm_code_str "\n\t"				\
-	".code32\n\t"					\
+	CODE_DEFAULT "\n\t"				\
 	".previous\n\t"
 
 /* REAL_CODE: declare a fragment of code that executes in real mode */
 #define REAL_CODE( asm_code_str )			\
-	"pushl $1f\n\t"					\
+	"push $1f\n\t"					\
 	"call real_call\n\t"				\
 	"addl $4, %%esp\n\t"				\
 	TEXT16_CODE ( "\n1:\n\t"			\
@@ -194,8 +201,10 @@ extern void remove_user_from_rm_stack ( userptr_t data, size_t size );
 /* PHYS_CODE: declare a fragment of code that executes in flat physical mode */
 #define PHYS_CODE( asm_code_str )			\
 	"call _virt_to_phys\n\t"			\
+	".code32\n\t"					\
 	asm_code_str					\
-	"call _phys_to_virt\n\t"
+	"call _phys_to_virt\n\t"			\
+	CODE_DEFAULT "\n\t"
 
 /** Number of interrupts */
 #define NUM_INT 256

src/arch/i386/transitions/librm_mgmt.c

@@ -80,8 +80,8 @@ void set_interrupt_vector ( unsigned int intr, void *vector ) {
 	idte = &idt[intr];
 	idte->segment = VIRTUAL_CS;
 	idte->attr = ( vector ? ( IDTE_PRESENT | IDTE_TYPE_IRQ32 ) : 0 );
-	idte->low = ( ( ( uint32_t ) vector ) & 0xffff );
-	idte->high = ( ( ( uint32_t ) vector ) >> 16 );
+	idte->low = ( ( ( intptr_t ) vector ) & 0xffff );
+	idte->high = ( ( ( intptr_t ) vector ) >> 16 );
 }
 
 /**
@@ -99,8 +99,8 @@ void init_idt ( void ) {
 		vec->movb = MOVB_INSN;
 		vec->intr = intr;
 		vec->jmp = JMP_INSN;
-		vec->offset = ( ( uint32_t ) interrupt_wrapper -
-				( uint32_t ) vec->next );
+		vec->offset = ( ( intptr_t ) interrupt_wrapper -
+				( intptr_t ) vec->next );
 		set_interrupt_vector ( intr, vec );
 	}
 	DBGC ( &intr_vec[0], "INTn vector at %p+%zxn (phys %#lx+%zxn)\n",
@@ -132,7 +132,7 @@ static struct profiler * interrupt_profiler ( int intr ) {
  *
  * @v intr		Interrupt number
  */
-void __attribute__ (( cdecl, regparm ( 1 ) )) interrupt ( int intr ) {
+void __attribute__ (( regparm ( 1 ) )) interrupt ( int intr ) {
 	struct profiler *profiler = interrupt_profiler ( intr );
 	uint32_t discard_eax;
 

src/arch/i386/transitions/librm_test.c

@@ -69,9 +69,11 @@ static void librm_test_prot_call ( void ) {
 static void librm_test_exec ( void ) {
 	unsigned int i;
 	unsigned long timestamp;
-	unsigned long started;
-	unsigned long stopped;
-	unsigned int discard_d;
+	uint32_t timestamp_lo;
+	uint32_t timestamp_hi;
+	uint32_t started;
+	uint32_t stopped;
+	uint32_t discard_d;
 
 	/* Profile mode transitions.  We want to profile each
 	 * direction of the transition separately, so perform an RDTSC
@@ -81,8 +83,12 @@ static void librm_test_exec ( void ) {
 	for ( i = 0 ; i < PROFILE_COUNT ; i++ ) {
 		profile_start ( &p2r_profiler );
 		__asm__ __volatile__ ( REAL_CODE ( "rdtsc\n\t" )
-				       : "=a" ( timestamp ), "=d" ( discard_d )
+				       : "=a" ( timestamp_lo ),
+					 "=d" ( timestamp_hi )
 				       : );
+		timestamp = timestamp_lo;
+		if ( sizeof ( timestamp ) > sizeof ( timestamp_lo ) )
+			timestamp |= ( ( ( uint64_t ) timestamp_hi ) << 32 );
 		profile_start_at ( &r2p_profiler, timestamp );
 		profile_stop ( &r2p_profiler );
 		profile_stop_at ( &p2r_profiler, timestamp );
@@ -98,14 +104,14 @@ static void librm_test_exec ( void ) {
 	/* Profile complete protected-mode call cycle */
 	for ( i = 0 ; i < PROFILE_COUNT ; i++ ) {
 		__asm__ __volatile__ ( REAL_CODE ( "rdtsc\n\t"
-						   "movl %0, %2\n\t"
-						   "pushl %3\n\t"
+						   "movl %k0, %k2\n\t"
+						   "pushl %k3\n\t"
 						   "pushw %%cs\n\t"
 						   "call prot_call\n\t"
 						   "addw $4, %%sp\n\t"
 						   "rdtsc\n\t" )
 				       : "=a" ( stopped ), "=d" ( discard_d ),
-					 "=r" ( started )
+					 "=R" ( started )
 				       : "i" ( librm_test_prot_call ) );
 		profile_start_at ( &prot_call_profiler, started );
 		profile_stop_at ( &prot_call_profiler, stopped );