- missing ppc stub

- kernel_m68K almost links now, jsut bails out on the linker script...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26096 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/arch/m68k/arch_cpu.h

@@ -15,6 +15,9 @@
 
 #define SR_IP_MASK 0x0700
 #define SR_S 0x2000
+#define M68K_SR_T_MASK 0xC000
+#define M68K_SR_T0 14
+#define M68K_SR_T1 15
 
 #ifndef _ASSEMBLER
 

headers/private/kernel/arch/m68k/arch_vm.h

@@ -25,6 +25,7 @@ struct m68k_vm_ops {
 	status_t (*arch_vm_translation_map_early_map)(kernel_args *ka, addr_t virtualAddress, addr_t physicalAddress, 
 		uint8 attributes, addr_t (*get_free_page)(kernel_args *));
 	status_t (*arch_vm_translation_map_early_query)(addr_t va, addr_t *out_physical);
+	void (*m68k_set_pgdir)(void *);
 #if 0 /* ppc stuff only ? */
 	status_t (*m68k_map_address_range)(addr_t virtualAddress, addr_t physicalAddress,
 		size_t size);
@@ -33,5 +34,17 @@ struct m68k_vm_ops {
 #endif
 };
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern struct m68k_vm_ops *get_vm_ops();
+
+extern void *m68k_translation_map_get_pgdir(vm_translation_map *map);
+extern void m68k_set_pgdir(void *rt);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif	/* ARCH_M68K_VM_H */

src/system/kernel/arch/m68k/arch_030_mmu.cpp

@@ -10,12 +10,28 @@
 
 #include <arch_030_mmu.h>
 
-#define ARCH_M68K_MMU_TYPE MMU_68030
+#define ARCH_M68K_MMU_TYPE 68030
 
 #include "arch_vm_translation_map_impl.cpp"
 
+static void
+set_pgdir(void *rt)
+{
+	long_page_directory_entry entry;
+	*(uint64 *)&entry = DFL_PAGEENT_VAL;
+	entry.type = DT_ROOT;
+	entry.addr = TA_TO_PREA(((addr_t)rt));
+
+	asm volatile( \
+		"pmove (%0),%%srp\n" \
+		"pmove (%0),%%crp\n" \
+		: : "a"((uint64 *)&entry));
+	
+}
+
+
 struct m68k_vm_ops m68030_vm_ops = {
-	m68k_translation_map_get_pgdir,
+	_m68k_translation_map_get_pgdir,
 	m68k_vm_translation_map_init_map,
 	m68k_vm_translation_map_init_kernel_map_post_sem,
 	m68k_vm_translation_map_init,
@@ -23,6 +39,7 @@ struct m68k_vm_ops m68030_vm_ops = {
 	m68k_vm_translation_map_init_post_sem,
 	m68k_vm_translation_map_early_map,
 	/*m68k_vm_translation_map_*/early_query,
+	set_pgdir,
 #if 0
 	m68k_map_address_range,
 	m68k_unmap_address_range,

src/system/kernel/arch/m68k/arch_atomic.c

@@ -19,6 +19,9 @@
  * Slow, using spinlocks...
  */
 
+#warning M68K: detect 060 here
+#if 0
+
 static spinlock atomic_lock = 0;
 
 int64
@@ -241,3 +244,4 @@ access_violation:
 	// XXX kill application
 	return -1;
 }
+#endif

src/system/kernel/arch/m68k/arch_commpage.cpp

@@ -14,18 +14,12 @@
 #include <smp.h>
 
 
-// user syscall assembly stubs
-extern "C" void _user_syscall_int(void);
-extern unsigned int _user_syscall_int_end;
-extern "C" void _user_syscall_sysenter(void);
-extern unsigned int _user_syscall_sysenter_end;
-
 
 status_t
 arch_commpage_init(void)
 {
-	panic("WRITEME");
-	return B_NO_INIT;
+	/* no optimized memcpy or anything yet */
+	/* we don't use it for syscall yet either */
 	return B_OK;
 }
 

src/system/kernel/arch/m68k/arch_cpu.cpp

@@ -42,6 +42,16 @@ arch_cpu_preboot_init_percpu(kernel_args *args, int curr_cpu)
 }
 
 
+status_t 
+arch_cpu_init_percpu(kernel_args *args, int curr_cpu)
+{
+	//detect_cpu(curr_cpu);
+
+	// we only support one anyway...
+	return 0;
+}
+
+
 status_t
 arch_cpu_init(kernel_args *args)
 {

src/system/kernel/arch/m68k/arch_thread.c

@@ -18,7 +18,9 @@
 #include <boot/stage2.h>
 #include <kernel.h>
 #include <thread.h>
+#include <vm_address_space.h>
 #include <vm_types.h>
+#include <arch_vm.h>
 //#include <arch/vm_translation_map.h>
 
 #include <string.h>
@@ -90,6 +92,28 @@ m68k_get_user_iframe(void)
 }
 
 
+void *
+m68k_next_page_directory(struct thread *from, struct thread *to)
+{
+	if (from->team->address_space != NULL && to->team->address_space != NULL) {
+		// they are both user space threads
+		if (from->team == to->team) {
+			// dont change the pgdir, same address space
+			return NULL;
+		}
+		// switching to a new address space
+		return m68k_translation_map_get_pgdir(&to->team->address_space->translation_map);
+	} else if (from->team->address_space == NULL && to->team->address_space == NULL) {
+		// they must both be kernel space threads
+		return NULL;
+	} else if (to->team->address_space == NULL) {
+		// the one we're switching to is kernel space
+		return m68k_translation_map_get_pgdir(&vm_kernel_address_space()->translation_map);
+	}
+	
+	return m68k_translation_map_get_pgdir(&to->team->address_space->translation_map);
+}
+
 // #pragma mark -
 
 
@@ -181,24 +205,17 @@ arch_thread_switch_kstack_and_call(struct thread *t, addr_t newKstack,
 
 
 void
-arch_thread_context_switch(struct thread *t_from, struct thread *t_to)
+arch_thread_context_switch(struct thread *from, struct thread *to)
 {
-#warning M68K: WRITEME
-    // set the new kernel stack in the EAR register.
-	// this is used in the exception handler code to decide what kernel stack to 
-	// switch to if the exception had happened when the processor was in user mode  
-	//asm("mtear  %0" :: "g"(t_to->kernel_stack_base + KERNEL_STACK_SIZE - 8));
+	addr_t newPageDirectory;
 
-    // switch the asids if we need to
-	if (t_to->team->address_space != NULL) {
-		// the target thread has is user space
-		if (t_from->team != t_to->team) {
-			// switching to a new address space
-			m68k_translation_map_change_asid(&t_to->team->address_space->translation_map);
-		}
-	}
+	newPageDirectory = (addr_t)m68k_next_page_directory(from, to);
 
-	m68k_context_switch(&t_from->arch_info.sp, t_to->arch_info.sp);
+	if ((newPageDirectory % B_PAGE_SIZE) != 0)
+		panic("arch_thread_context_switch: bad pgdir 0x%lx\n", newPageDirectory);
+#warning M68K: export from arch_vm.c
+	m68k_set_pgdir(newPageDirectory);
+	m68k_context_switch(&from->arch_info.sp, to->arch_info.sp);
 }
 
 

src/system/kernel/arch/m68k/arch_user_debugger.cpp

@@ -13,6 +13,7 @@
 #include <arch/user_debugger.h>
 
 
+#warning M68K: WRITEME
 void
 arch_clear_team_debug_info(struct arch_team_debug_info *info)
 {
@@ -39,6 +40,28 @@ arch_destroy_thread_debug_info(struct arch_thread_debug_info *info)
 }
 
 
+void
+arch_update_thread_single_step()
+{
+	if (struct iframe* frame = m68k_get_user_iframe()) {
+		struct thread* thread = thread_get_current_thread();
+	
+		// set/clear T1 in SR depending on if single stepping is desired
+		// T1 T0
+		// 0  0  no tracing
+		// 0  1  trace on flow
+		// 1  0  single step
+		// 1  1  undef
+		if (thread->debug_info.flags & B_THREAD_DEBUG_SINGLE_STEP) {
+			frame->cpu.sr &= ~(M68K_SR_T_MASK);
+			frame->cpu.sr |= (1 << M68K_SR_T1);
+		} else {
+			frame->cpu.sr &= ~(M68K_SR_T_MASK);
+		}
+	}
+}
+
+
 void
 arch_set_debug_cpu_state(const struct debug_cpu_state *cpuState)
 {
@@ -78,3 +101,8 @@ arch_clear_watchpoint(void *address)
 	return B_ERROR;
 }
 
+bool
+arch_has_breakpoints(struct arch_team_debug_info *info)
+{
+	return false;
+}

src/system/kernel/arch/m68k/arch_vm.cpp

@@ -15,6 +15,7 @@
 #include <boot/kernel_args.h>
 
 #include <vm.h>
+#include <vm_types.h>
 #include <arch/vm.h>
 #include <arch_mmu.h>
 
@@ -103,6 +104,8 @@ arch_vm_init_post_modules(kernel_args *args)
 void 
 arch_vm_aspace_swap(vm_address_space *aspace)
 {
+	m68k_set_pgdir(m68k_translation_map_get_pgdir(
+		&aspace->translation_map));
 }
 
 

src/system/kernel/arch/m68k/arch_vm_translation_map.cpp

@@ -33,7 +33,8 @@ extern struct m68k_vm_ops m68030_vm_ops;
 //extern struct m68k_vm_ops m68030_vm_ops;
 //extern struct m68k_vm_ops m68030_vm_ops;
 
-static m68k_vm_ops *get_vm_ops()
+#warning M68K: use a static!
+m68k_vm_ops *get_vm_ops()
 {
 	int mmu = arch_mmu_type;
 
@@ -126,6 +127,11 @@ arch_vm_translation_map_early_query(addr_t va, addr_t *out_physical)
 
 
 // #pragma mark -
+void
+m68k_set_pgdir(void *rt)
+{
+	return get_vm_ops()->m68k_set_pgdir(rt);
+}
 #if 0
 
 status_t

src/system/kernel/arch/m68k/arch_vm_translation_map_impl.cpp

@@ -132,8 +132,9 @@ static status_t put_physical_page_tmap(addr_t va);
 static void flush_tmap(vm_translation_map *map);
 
 
+#warning M68K: RENAME
 static void *
-m68k_translation_map_get_pgdir(vm_translation_map *map)
+_m68k_translation_map_get_pgdir(vm_translation_map *map)
 {
 	return map->arch_data->rtdir_phys;
 }

src/system/kernel/arch/ppc/arch_user_debugger.cpp

@@ -36,6 +36,12 @@ arch_destroy_thread_debug_info(struct arch_thread_debug_info *info)
 }
 
 
+void
+arch_update_thread_single_step()
+{
+}
+
+
 void
 arch_set_debug_cpu_state(const struct debug_cpu_state *cpuState)
 {
@@ -75,3 +81,8 @@ arch_clear_watchpoint(void *address)
 	return B_ERROR;
 }
 
+bool
+arch_has_breakpoints(struct arch_team_debug_info *info)
+{
+	return false;
+}