[PATCH] M68k update (part 20)

Merge remaining bits of core HP300 support

arch/m68k/kernel/head.S

@@ -312,6 +312,9 @@
 #ifdef CONFIG_Q40
 .globl q40_mem_cptr	
 #endif		
+#ifdef CONFIG_HP300
+.globl hp300_phys_ram_base
+#endif
 
 CPUTYPE_040	= 1	/* indicates an 040 */
 CPUTYPE_060	= 2	/* indicates an 060 */
@@ -596,6 +599,64 @@ ENTRY(_start)
 __INIT
 ENTRY(__start)
 
+#ifdef CONFIG_HP300
+/* This is a hack.  The HP NetBSD bootloader loads us at an arbitrary
+   address (apparently 0xff002000 in practice) which is not good if we need
+   to be able to map this to VA 0x1000.  We could do it with pagetables but
+   a better solution seems to be to relocate the kernel in physical memory
+   before we start.  
+	
+   So, we copy the entire kernel image (code+data+bss) down to the 16MB
+   boundary that marks the start of RAM.  This is slightly tricky because
+   we must not overwrite the copying code itself. :-)  */
+
+/* 15/5/98.  The start address of physical RAM changes depending on how much
+   RAM is present.  This is actually a blessing in disguise as it provides
+   a way for us to work out the RAM size rather than hardwiring it.  */
+
+	lea	%pc@(_start),%a0
+	movel	%a0,%d6
+	and	#0xffff0000, %d6
+	lea	%pc@(hp300_phys_ram_base),%a0
+	movel	%d6, %a0@
+	movel	%pc@(L(custom)),%a3
+	moveb	#0xfe,%d7
+	moveb	%d7,%a3@(0x1ffff)
+	lea	%pc@(Lcopystart),%a0
+	lea	%pc@(Lcopyend),%a1
+	movel	%d6,%a2			/* Start of physical RAM */
+1:	moveb	%a0@+,%d0
+	moveb	%d0,%a2@+
+	cmpl	%a0,%a1
+	jbne	1b
+	movel	%d6,%a2
+	moveb	#0xfd,%d7
+	moveb	%d7,%a3@(0x1ffff)
+	lea	%pc@(_stext),%a0
+	lea	%pc@(_end),%a1
+	jmp	%a2@
+
+Lcopystart:
+	moveb	#0xf7,%d7
+	moveb	%d7,%a3@(0x1ffff)
+	movel	%d6,%a2	/* Start of kernel */
+	add	#0x1000,%a2
+1:	moveb	%a0@+,%d0
+	moveb	%d0,%a2@+
+	cmpl	%a0,%a1
+	jbne	1b
+	moveb	#0,%d7
+	moveb	%d7,%a3@(0x1ffff)
+	movel	%d6,%a0
+	addl	#Lstart1,%a0
+	jmp	%a0@
+Lcopyend:	
+
+Lstart1:
+	moveb	#0x3f,%d7
+	moveb	%d7,%a3@(0x1ffff)
+#endif /* CONFIG_HP300 */
+
 /*
  * Setup initial stack pointer
  */
@@ -605,6 +666,7 @@ ENTRY(__start)
  * Record the CPU and machine type.
  */
 
+#ifndef CONFIG_HP300
 	get_bi_record	BI_MACHTYPE
 	lea	%pc@(m68k_machtype),%a1
 	movel	%a0@,%a1@
@@ -620,6 +682,23 @@ ENTRY(__start)
 	get_bi_record	BI_CPUTYPE
 	lea	%pc@(m68k_cputype),%a1
 	movel	%a0@,%a1@
+#else /* CONFIG_HP300 */
+	/* FIXME HP300 doesn't use bootinfo yet */
+	movel	#MACH_HP300,%d4
+	lea	%pc@(m68k_machtype),%a0
+	movel	%d4,%a0@
+	movel	#FPU_68881,%d0
+	lea	%pc@(m68k_fputype),%a0
+	movel	%d0,%a0@
+	movel	#MMU_68030,%d0
+	lea	%pc@(m68k_mmutype),%a0
+	movel	%d0,%a0@
+	movel	#CPU_68030,%d0
+	lea	%pc@(m68k_cputype),%a0
+	movel	%d0,%a0@
+
+	leds(0x1)
+#endif /* CONFIG_HP300 */
 
 #ifdef CONFIG_MAC
 /*
@@ -893,6 +972,9 @@ L(nocon):
 
 	putc	'\n'
 	putc	'A'
+#ifdef CONFIG_HP300
+	leds(0x2)
+#endif /* CONFIG_HP300 */
 	dputn	%pc@(L(cputype))
 	dputn	%pc@(m68k_supervisor_cachemode)
 	dputn	%pc@(m68k_pgtable_cachemode)
@@ -1490,6 +1572,7 @@ func_start	get_bi_record,%d1
 
 	movel	ARG1,%d0
 	lea	%pc@(_end),%a0
+#ifndef CONFIG_HP300
 1:	tstw	%a0@(BIR_TAG)
 	jeq	3f
 	cmpw	%a0@(BIR_TAG),%d0
@@ -1503,6 +1586,7 @@ func_start	get_bi_record,%d1
 3:	moveq	#-1,%d0
 	lea	%a0@(BIR_SIZE),%a0
 4:
+#endif /* CONFIG_HP300 */
 func_return	get_bi_record
 
 
@@ -3739,7 +3823,12 @@ L(showtest):
 __INITDATA
 	.align	4
 
-#if defined(CONFIG_ATARI) || defined(CONFIG_AMIGA) || defined(CONFIG_HP300)
+#ifdef CONFIG_HP300
+hp300_phys_ram_base:
+#endif
+
+#if defined(CONFIG_ATARI) || defined(CONFIG_AMIGA) || \
+    defined(CONFIG_HP300) || defined(CONFIG_APOLLO)
 L(custom):
 L(iobase):
 	.long 0
@@ -3830,8 +3919,6 @@ L(mac_sccbase):
 LSRB0        = 0x10412
 LTHRB0       = 0x10416
 LCPUCTRL     = 0x10100
-L(iobase):
-        .long 0
 #endif
 
 __FINIT

arch/m68k/kernel/setup.c

@@ -217,8 +217,20 @@ void __init setup_arch(char **cmdline_p)
 	int i;
 	char *p, *q;
 
-	/* The bootinfo is located right after the kernel bss */
-	m68k_parse_bootinfo((const struct bi_record *)&_end);
+	if (!MACH_IS_HP300) {
+		/* The bootinfo is located right after the kernel bss */
+		m68k_parse_bootinfo((const struct bi_record *)&_end);
+	} else {
+		/* FIXME HP300 doesn't use bootinfo yet */
+		extern unsigned long hp300_phys_ram_base;
+		unsigned long hp300_mem_size = 0xffffffff-hp300_phys_ram_base;
+		m68k_cputype = CPU_68030;
+		m68k_fputype = FPU_68882;
+		m68k_memory[0].addr = hp300_phys_ram_base;
+		/* 0.5M fudge factor */
+		m68k_memory[0].size = hp300_mem_size-512*1024;
+		m68k_num_memory++;
+	}
 
 	if (CPU_IS_040)
 		m68k_is040or060 = 4;