Initial commit

src/platform/pb926/SConscript

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+
+
+# Inherit global environment
+Import('env')
+
+# The set of source files associated with this SConscript file.
+src_local = ['printascii.S','platform.c', 'uart.c', 'timer.c', 'irq.c']
+
+obj = env.Object(src_local)
+Return('obj')

src/platform/pb926/irq.c

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+/*
+ * Support for generic irq handling using platform irq controller (PL190)
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ */
+#include <l4/generic/platform.h>
+#include <l4/generic/irq.h>
+#include <l4/generic/time.h>
+#include INC_PLAT(irq.h)
+#include INC_PLAT(platform.h)
+#include INC_ARCH(exception.h)
+#include <l4/drivers/irq/pl190/pl190_vic.h>
+#include <l4/drivers/timer/sp804/sp804_timer.h>
+
+struct irq_chip irq_chip_array[IRQ_CHIPS_MAX] = {
+	[0] = {
+		.name = "Vectored irq controller",
+		.level = 0,
+		.cascade = IRQ_SIC,
+		.offset = 0,
+		.ops = {
+			.init = pl190_vic_init,
+			.read_irq = pl190_read_irq,
+			.ack_and_mask = pl190_mask_irq,
+			.unmask = pl190_unmask_irq,
+		},
+	},
+	[1] = {
+		.name = "Secondary irq controller",
+		.level = 1,
+		.cascade = IRQ_NIL,
+		.offset = SIRQ_CHIP_OFFSET,
+		.ops = {
+			.init = pl190_sic_init,
+			.read_irq = pl190_sic_read_irq,
+			.ack_and_mask = pl190_sic_mask_irq,
+			.unmask = pl190_sic_unmask_irq,
+		},
+	},
+};
+
+static int platform_timer_handler(void)
+{
+	sp804_irq_handler();
+	return do_timer_irq();
+}
+
+/* Built-in irq handlers initialised at compile time.
+ * Else register with register_irq() */
+struct irq_desc irq_desc_array[IRQS_MAX] = {
+	[IRQ_TIMER01] = {
+		.name = "Timer01",
+		.chip = &irq_chip_array[0],
+		.handler = platform_timer_handler,
+	},
+};
+

src/platform/pb926/platform.c

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+/*
+ * PB926 platform-specific initialisation and setup
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ *
+ */
+
+#include <l4/generic/platform.h>
+#include <l4/generic/space.h>
+#include <l4/generic/irq.h>
+#include INC_ARCH(linker.h)
+#include INC_PLAT(printascii.h)
+#include INC_SUBARCH(mm.h)
+#include INC_SUBARCH(mmu_ops.h)
+#include INC_GLUE(memory.h)
+#include INC_GLUE(memlayout.h)
+#include INC_PLAT(offsets.h)
+#include INC_PLAT(platform.h)
+#include INC_PLAT(uart.h)
+#include INC_PLAT(irq.h)
+#include INC_ARCH(asm.h)
+
+void init_platform_console(void)
+{
+	add_mapping(PB926_UART0_BASE, PL011_BASE, PAGE_SIZE,
+		    MAP_IO_DEFAULT_FLAGS);
+
+	/*
+	 * Map same UART IO area to userspace so that primitive uart-based
+	 * userspace printf can work. Note, this raw mapping is to be
+	 * removed in the future, when file-based io is implemented.
+	 */
+	add_mapping(PB926_UART0_BASE, USERSPACE_UART_BASE, PAGE_SIZE,
+		    MAP_USR_IO_FLAGS);
+
+	uart_init();
+}
+
+void init_platform_timer(void)
+{
+	add_mapping(PB926_TIMER01_BASE, PLATFORM_TIMER_BASE, PAGE_SIZE,
+		    MAP_IO_DEFAULT_FLAGS);
+	add_mapping(PB926_SYSCTRL_BASE,	PB926_SYSCTRL_VBASE, PAGE_SIZE,
+		    MAP_IO_DEFAULT_FLAGS);
+	timer_init();
+}
+
+void init_platform_irq_controller()
+{
+	add_mapping(PB926_VIC_BASE, PLATFORM_IRQCTRL_BASE, PAGE_SIZE,
+		    MAP_IO_DEFAULT_FLAGS);
+	add_mapping(PB926_SIC_BASE, PLATFORM_SIRQCTRL_BASE, PAGE_SIZE,
+		    MAP_IO_DEFAULT_FLAGS);
+	irq_controllers_init();
+}
+
+void platform_init(void)
+{
+	init_platform_console();
+	init_platform_timer();
+	init_platform_irq_controller();
+}
+

src/platform/pb926/printascii.S

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+
+#include INC_PLAT(debug-macro.S)
+#include INC_ARCH(asm.h)
+#include INC_GLUE(memlayout.h)
+		.text
+/*
+ * Useful debugging routines
+ */
+BEGIN_PROC(printhex8)
+		mov	r1, #8
+		b	printhex
+
+BEGIN_PROC(printhex4)
+		mov	r1, #4
+		b	printhex
+
+BEGIN_PROC(printhex2)
+		mov	r1, #2
+printhex:	adr	r2, hexbuf
+		add	r3, r2, r1
+		mov	r1, #0
+		strb	r1, [r3]
+1:		and	r1, r0, #15
+		mov	r0, r0, lsr #4
+		cmp	r1, #10
+		addlt	r1, r1, #'0'
+		addge	r1, r1, #'a' - 10
+		strb	r1, [r3, #-1]!
+		teq	r3, r2
+		bne	1b
+		mov	r0, r2
+		b	printascii
+
+		.ltorg
+
+
+	.align
+
+	@ vmem-linked image has strings in vmem addresses. This replaces
+	@ the reference with corresponding physical address. Note this
+	@ won't work if memory offsets aren't clear cut values for
+	@ orr'ing and bic'ing. rm = mmu bits rs = string address.
+	.macro get_straddr rs, rm
+		mrc	p15, 0, \rm, c1, c0		@ Get MMU bits.
+		tst	\rm, #1				@ MMU enabled?
+		biceq	\rs, \rs, #KERNEL_AREA_START	@ Clear Virtual mem offset.
+		orreq	\rs, \rs, #PHYS_ADDR_BASE	@ Add Phy mem offset.
+	.endm
+
+BEGIN_PROC(printascii)
+		get_straddr r0, r1
+		addruart r3
+		b	2f
+1:		waituart r2, r3
+		senduart r1, r3
+		busyuart r2, r3
+		teq	r1, #'\n'
+		moveq	r1, #'\r'
+		beq	1b
+2:		teq	r0, #0
+		ldrneb	r1, [r0], #1
+		teqne	r1, #0
+		bne	1b
+		mov	pc, lr
+END_PROC(printascii)
+
+BEGIN_PROC(printch)
+		addruart r3
+		mov	r1, r0
+		mov	r0, #0
+		b	1b
+
+hexbuf:		.space 16
+

src/platform/pb926/timer.c

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+/*
+ * Ties up platform timer with generic timer api
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ *
+ */
+#include <l4/generic/irq.h>
+#include <l4/generic/platform.h>
+#include INC_PLAT(platform.h)
+#include <l4/drivers/timer/sp804/sp804_timer.h>
+#include <l4/drivers/misc/sp810/sp810_sysctrl.h>
+
+void timer_init(void)
+{
+	/* Set timer 0 to 1MHz */
+	sp810_set_timclk(0, 1);
+
+	/* Initialise timer */
+	sp804_init();
+}
+
+void timer_start(void)
+{
+	irq_enable(IRQ_TIMER01);
+	sp804_set_irq(0, 1);	/* Enable timer0 irq */
+	sp804_enable(0, 1);	/* Enable timer0 */
+}
+

src/platform/pb926/uart.c

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+/*
+ * Ties up platform's uart driver functions with generic API
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ */
+#include <l4/generic/platform.h>
+#include INC_PLAT(platform.h)
+
+#include <l4/drivers/uart/pl011/pl011_uart.h>
+
+extern struct pl011_uart uart;
+
+void uart_init()
+{
+	uart.base = PL011_BASE;
+	uart.ops.initialise(&uart);
+}
+
+/* Generic uart function that lib/putchar.c expects to see implemented */
+void uart_putc(char c)
+{
+	int res;
+	/* Platform specific uart implementation */
+	do {
+		res = uart.ops.tx_char(c);
+	} while (res < 0);
+}
+

src/platform/tests/SConscript

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+
+
+# Inherit global environment
+Import('env')
+
+# The set of source files associated with this SConscript file.
+src_local = ['offsets.c']
+
+obj = env.Object(src_local)
+Return('obj')

src/platform/tests/offsets.c

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+#include <macros.h>
+#include <config.h>
+#include INC_PLAT(offsets.h)
+
+unsigned int PHYS_MEM_START = 0;	/* Dynamically allocated */
+unsigned int PHYS_MEM_END = 0; 		/* Dynamically allocated */
+unsigned int PHYS_ADDR_BASE = 0; 	/* Dynamically allocated */