diff options
Diffstat (limited to 'openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic')
4 files changed, 327 insertions, 0 deletions
diff --git a/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/Makefile b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/Makefile new file mode 100644 index 000000000..e16a80e56 --- /dev/null +++ b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/Makefile @@ -0,0 +1,26 @@ +# +# Makefile for generic Broadcom MIPS boards +# +# Copyright 2004, Broadcom Corporation +# All Rights Reserved. +# +# THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY +# KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM +# SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS +# FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. +# +# $Id$ +# + +.S.s: + $(CPP) $(AFLAGS) $< -o $*.s +.S.o: + $(CC) $(AFLAGS) -c $< -o $*.o + +O_TARGET := brcm.o + +obj-y := int-handler.o irq.o + +obj-$(CONFIG_REMOTE_DEBUG) += gdb_hook.o + +include $(TOPDIR)/Rules.make diff --git a/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/gdb_hook.c b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/gdb_hook.c new file mode 100644 index 000000000..1345289bb --- /dev/null +++ b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/gdb_hook.c @@ -0,0 +1,120 @@ +/* + * Copyright 2004, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. + * + * ######################################################################## + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * ######################################################################## + * + * This is the interface to the remote debugger stub. + * + */ + +#include <linux/serialP.h> +#include <linux/serial_reg.h> + +#include <asm/serial.h> +#include <asm/io.h> + +static struct async_struct kdb_port_info = {0}; + +static __inline__ unsigned int serial_in(struct async_struct *info, int offset) +{ + return readb((unsigned long) info->iomem_base + + (offset<<info->iomem_reg_shift)); +} + +static __inline__ void serial_out(struct async_struct *info, int offset, + int value) +{ + writeb(value, (unsigned long) info->iomem_base + + (offset<<info->iomem_reg_shift)); +} + +void rs_kgdb_hook(struct serial_state *ser) { + int t; + + kdb_port_info.state = ser; + kdb_port_info.magic = SERIAL_MAGIC; + kdb_port_info.port = ser->port; + kdb_port_info.flags = ser->flags; + kdb_port_info.iomem_base = ser->iomem_base; + kdb_port_info.iomem_reg_shift = ser->iomem_reg_shift; + kdb_port_info.MCR = UART_MCR_DTR | UART_MCR_RTS; + + /* + * Clear all interrupts + */ + serial_in(&kdb_port_info, UART_LSR); + serial_in(&kdb_port_info, UART_RX); + serial_in(&kdb_port_info, UART_IIR); + serial_in(&kdb_port_info, UART_MSR); + + /* + * Now, initialize the UART + */ + serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */ + serial_out(&kdb_port_info, UART_MCR, kdb_port_info.MCR); + + /* + * and set the speed of the serial port + * (currently hardwired to 115200 8N1 + */ + + /* baud rate is fixed to 115200 (is this sufficient?)*/ + t = kdb_port_info.state->baud_base / 115200; + /* set DLAB */ + serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8 | UART_LCR_DLAB); + serial_out(&kdb_port_info, UART_DLL, t & 0xff);/* LS of divisor */ + serial_out(&kdb_port_info, UART_DLM, t >> 8); /* MS of divisor */ + /* reset DLAB */ + serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8); +} + +int putDebugChar(char c) +{ + + if (!kdb_port_info.state) { /* need to init device first */ + return 0; + } + + while ((serial_in(&kdb_port_info, UART_LSR) & UART_LSR_THRE) == 0) + ; + + serial_out(&kdb_port_info, UART_TX, c); + + return 1; +} + +char getDebugChar(void) +{ + if (!kdb_port_info.state) { /* need to init device first */ + return 0; + } + + while (!(serial_in(&kdb_port_info, UART_LSR) & 1)) + ; + + return(serial_in(&kdb_port_info, UART_RX)); +} diff --git a/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/int-handler.S b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/int-handler.S new file mode 100644 index 000000000..de8f115c2 --- /dev/null +++ b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/int-handler.S @@ -0,0 +1,51 @@ +/* + * Generic interrupt handler for Broadcom MIPS boards + * + * Copyright 2004, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * $Id$ + */ + +#include <linux/config.h> + +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + +/* + * MIPS IRQ Source + * -------- ------ + * 0 Software (ignored) + * 1 Software (ignored) + * 2 Combined hardware interrupt (hw0) + * 3 Hardware + * 4 Hardware + * 5 Hardware + * 6 Hardware + * 7 R4k timer + */ + + .text + .set noreorder + .set noat + .align 5 + NESTED(brcmIRQ, PT_SIZE, sp) + SAVE_ALL + CLI + .set at + .set noreorder + + jal brcm_irq_dispatch + move a0, sp + + j ret_from_irq + nop + + END(brcmIRQ) diff --git a/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/irq.c b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/irq.c new file mode 100644 index 000000000..157c6b380 --- /dev/null +++ b/openwrt/package/linux/kernel-source/arch/mips/brcm-boards/generic/irq.c @@ -0,0 +1,130 @@ +/* + * Generic interrupt control functions for Broadcom MIPS boards + * + * Copyright 2004, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * $Id$ + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/irq.h> + +#include <asm/irq.h> +#include <asm/mipsregs.h> +#include <asm/gdb-stub.h> + +#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5) + +extern asmlinkage void brcmIRQ(void); +extern asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs); + +void +brcm_irq_dispatch(struct pt_regs *regs) +{ + u32 cause; + + cause = read_c0_cause() & + read_c0_status() & + CAUSEF_IP; + +#ifdef CONFIG_KERNPROF + change_c0_status(cause | 1, 1); +#else + clear_c0_status(cause); +#endif + + if (cause & CAUSEF_IP7) + do_IRQ(7, regs); + if (cause & CAUSEF_IP2) + do_IRQ(2, regs); + if (cause & CAUSEF_IP3) + do_IRQ(3, regs); + if (cause & CAUSEF_IP4) + do_IRQ(4, regs); + if (cause & CAUSEF_IP5) + do_IRQ(5, regs); + if (cause & CAUSEF_IP6) + do_IRQ(6, regs); +} + +static void +enable_brcm_irq(unsigned int irq) +{ + if (irq < 8) + set_c0_status(1 << (irq + 8)); + else + set_c0_status(IE_IRQ0); +} + +static void +disable_brcm_irq(unsigned int irq) +{ + if (irq < 8) + clear_c0_status(1 << (irq + 8)); + else + clear_c0_status(IE_IRQ0); +} + +static void +ack_brcm_irq(unsigned int irq) +{ + /* Already done in brcm_irq_dispatch */ +} + +static unsigned int +startup_brcm_irq(unsigned int irq) +{ + enable_brcm_irq(irq); + + return 0; /* never anything pending */ +} + +static void +end_brcm_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) + enable_brcm_irq(irq); +} + +static struct hw_interrupt_type brcm_irq_type = { + typename: "MIPS", + startup: startup_brcm_irq, + shutdown: disable_brcm_irq, + enable: enable_brcm_irq, + disable: disable_brcm_irq, + ack: ack_brcm_irq, + end: end_brcm_irq, + NULL +}; + +void __init +init_IRQ(void) +{ + int i; + + for (i = 0; i < NR_IRQS; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = 0; + irq_desc[i].depth = 1; + irq_desc[i].handler = &brcm_irq_type; + } + + set_except_vector(0, brcmIRQ); + change_c0_status(ST0_IM, ALLINTS); + +#ifdef CONFIG_REMOTE_DEBUG + printk("Breaking into debugger...\n"); + set_debug_traps(); + breakpoint(); +#endif +} |