* Add atari memory map defs.

* Add osheader defs.
* Check for FPU.
* note on prg vs bootsector.
* mmu stuff.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23468 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/boot/platform/atari_m68k/atari_memory_map.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2008, François Revol, revol@free.fr. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef ATARI_MEMORY_MAP_H
+#define ATARI_MEMORY_MAP_H
+
+#define ATARI_CHIPRAM_TOP_TT		0x00a00000
+/* -> e00000 is VME for MegaST*/
+#define ATARI_CHIPRAM_TOP_FALCON	0x00e00000
+
+#define ATARI_ROM_BASE				ATARI_CHIPRAM_TOP_FALCON
+#define ATARI_ROM_TOP				0x00f00000
+#define ATARI_IO_BASE				ATARI_ROM_TOP
+#define 	ATARI_CARTRIDGE_BASE	0x00fa0000
+#define 	ATARI_OLD_ROM_BASE		0x00fc0000
+
+#define ATARI_IO_TOP				0x01000000
+#define ATARI_FASTRAM_TOP			ATARI_IO_TOP
+
+#define ATARI_SHADOW_BASE			0xff000000
+
+#endif	/* ATARI_MEMORY_MAP_H */

src/system/boot/platform/atari_m68k/cpu.cpp

@@ -29,12 +29,15 @@
 #	define TRACE(x) ;
 #endif
 
+#warning M68K: add set_vbr()
+
 static status_t
 check_cpu_features()
 {
 #warning M68K: TODO: probe ourselves, we shouldn't trust the TOS!
 
-	const tos_cookie *c = tos_find_cookie('_CPU');
+	const tos_cookie *c;
+	c = tos_find_cookie('_CPU');
 	if (!c) {
 		panic("can't get a cookie (_CPU)! Mum, I'm hungry!");
 		return EINVAL;
@@ -47,6 +50,18 @@ check_cpu_features()
 	gKernelArgs.arch_args.has_lpstop = (c->ivalue >= 60)?true:false;
 #warning M68K: add cpu type to kern args
 
+	c = tos_find_cookie('_FPU');
+	if (!c) {
+		panic("can't get a cookie (_FPU)! Mum, I'm hungry!");
+		return EINVAL;
+	}
+
+#warning M68K: check for fpu in detail
+	if (c->ivalue < 2 || c->ivalue > 7) {
+		panic("bad fpu");
+		return EINVAL;
+	}
+
 	return B_OK;
 }
 

src/system/boot/platform/atari_m68k/mmu.cpp

@@ -48,36 +48,6 @@
 #	define TRACE(x) ;
 #endif
 
-struct gdt_idt_descr {
-	uint16 limit;
-	uint32 *base;
-} _PACKED;
-
-// memory structure returned by int 0x15, ax 0xe820
-struct extended_memory {
-	uint64 base_addr;
-	uint64 length;
-	uint32 type;
-};
-
-#ifdef _PXE_ENV
-
-static const uint32 kDefaultPageTableFlags = 0x07;	// present, user, R/W
-static const size_t kMaxKernelSize = 0x100000;		// 1 MB for the kernel
-
-// working page directory and page table
-static uint32 *sPageDirectory = 0;
-
-static addr_t sNextPhysicalAddress = 0x112000;
-static addr_t sNextVirtualAddress = KERNEL_BASE + kMaxKernelSize;
-static addr_t sMaxVirtualAddress = KERNEL_BASE + 0x400000;
-
-static addr_t sNextPageTableAddress = 0x7d000;
-static const uint32 kPageTableRegionEnd = 0x8b000;
-	// we need to reserve 2 pages for the SMP trampoline code
-
-#else
-
 static const uint32 kDefaultPageTableFlags = 0x07;	// present, user, R/W
 static const size_t kMaxKernelSize = 0x100000;		// 1 MB for the kernel
 
@@ -92,9 +62,6 @@ static addr_t sNextPageTableAddress = 0x90000;
 static const uint32 kPageTableRegionEnd = 0x9e000;
 	// we need to reserve 2 pages for the SMP trampoline code
 
-#endif
-
-
 static addr_t
 get_next_virtual_address(size_t size)
 {

src/system/boot/platform/atari_m68k/mmu.h

@@ -22,6 +22,12 @@ extern addr_t mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint3
 extern void *mmu_allocate(void *virtualAddress, size_t size);
 extern void mmu_free(void *virtualAddress, size_t size);
 
+struct boot_mmu_ops {
+		// len=0 to disable
+	status_t (*set_tt)(int which, addr_t pa, size_t len, uint32 perms);
+	
+};
+
 #ifdef __cplusplus
 }
 #endif

src/system/boot/platform/atari_m68k/stage1.S

@@ -73,6 +73,12 @@
 #define	S_IFDIR						00000040000o
 
 
+// NOTE: normal programs (.prg) run as user mode, 
+// while boot sector is chained in supervisor mode.
+// this means using Super(SUP_INQUIRE) we can know 
+// from the same entry point if we were run from boot code or prg.
+
+
 	//Pterm0
 	//move.w	#1,%d0
 	//trap	#1

src/system/boot/platform/atari_m68k/toscalls.h

@@ -129,6 +129,12 @@ extern int32 xbios(uint16 nr, ...);
 
 extern int32 gemdos(uint16 nr, ...);
 
+#define SUP_USER		0
+#define SUP_SUPER		1
+
+#define SUP_SET			(void *)0
+#define SUP_INQUIRE		(void *)1
+
 // official names
 #define Pterm0() gemdos(0)
 #define Cconin() gemdos(1)
@@ -167,6 +173,33 @@ static inline const tos_cookie *tos_find_cookie(uint32 what)
 	return NULL;
 }
 
+/*
+ * OSHEADER access
+ */
+
+typedef struct tos_osheader {
+	uint16 os_entry;
+	uint16 os_version;
+	void *reseth;
+	struct tos_osheader *os_beg;
+	void *os_end;
+	void *os_rsv1;
+	void *os_magic;
+	uint32 os_date;
+	uint32 os_conf;
+	//uint32/16? os_dosdate;
+	// ... more stuff we don't care about
+} tos_osheader;
+
+#define tos_sysbase ((const struct tos_osheader **)0x4F2)
+
+static inline const struct tos_osheader *tos_get_osheader()
+{
+	if (!(*tos_sysbase))
+		return NULL;
+	return (*tos_sysbase)->os_beg;
+}
+
 #endif /* __ASSEMBLER__ */
 
 #ifdef __cplusplus