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SubjectRe: [PATCH 1/2] MIPS: Add basic support for Loongson1B (UPDATED)
From
2011/9/25, wu zhangjin <wuzhangjin@gmail.com>:
> On Sat, Sep 24, 2011 at 2:21 PM, <keguang.zhang@gmail.com> wrote:
>> From: Kelvin Cheung <keguang.zhang@gmail.com>
>>
>> This patch adds basic support for Loongson1B
>> including serial port, timer and interrupt handler.
>>
>> Loongson 1B is a 32-bit SoC designed by Institute of
>> Computing Technology (ICT), Chinese Academy of Sciences (CAS),
>> which implements the MIPS32 release 2 instruction set.
>>
>> Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
>> ---
>> arch/mips/Kbuild.platforms | 1 +
>> arch/mips/Kconfig | 31 ++++
>> arch/mips/include/asm/cpu.h | 3 +-
>> arch/mips/include/asm/mach-loongson1/irq.h | 70 +++++++++
>> arch/mips/include/asm/mach-loongson1/loongson1.h | 48 +++++++
>> arch/mips/include/asm/mach-loongson1/platform.h | 20 +++
>> arch/mips/include/asm/mach-loongson1/prom.h | 24 +++
>> arch/mips/include/asm/mach-loongson1/regs-clk.h | 32 ++++
>> arch/mips/include/asm/mach-loongson1/regs-intc.h | 25 ++++
>> arch/mips/include/asm/mach-loongson1/regs-wdt.h | 21 +++
>> arch/mips/include/asm/mach-loongson1/war.h | 25 ++++
>> arch/mips/include/asm/module.h | 2 +
>> arch/mips/kernel/cpu-probe.c | 15 ++
>> arch/mips/kernel/perf_event_mipsxx.c | 6 +
>> arch/mips/kernel/traps.c | 1 +
>> arch/mips/loongson1/Kconfig | 21 +++
>> arch/mips/loongson1/Makefile | 11 ++
>> arch/mips/loongson1/Platform | 7 +
>> arch/mips/loongson1/common/Makefile | 5 +
>> arch/mips/loongson1/common/clock.c | 165
>> ++++++++++++++++++++++
>> arch/mips/loongson1/common/irq.c | 136
>> ++++++++++++++++++
>> arch/mips/loongson1/common/platform.c | 50 +++++++
>> arch/mips/loongson1/common/prom.c | 88 ++++++++++++
>> arch/mips/loongson1/common/reset.c | 46 ++++++
>> arch/mips/loongson1/common/setup.c | 29 ++++
>> arch/mips/loongson1/ls1b/Makefile | 5 +
>> arch/mips/loongson1/ls1b/board.c | 30 ++++
>> arch/mips/oprofile/common.c | 1 +
>> arch/mips/oprofile/op_model_mipsxx.c | 4 +
>> 29 files changed, 921 insertions(+), 1 deletions(-)
>> create mode 100644 arch/mips/include/asm/mach-loongson1/irq.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/loongson1.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/platform.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/prom.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/regs-clk.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/regs-intc.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/regs-wdt.h
>> create mode 100644 arch/mips/include/asm/mach-loongson1/war.h
>> create mode 100644 arch/mips/loongson1/Kconfig
>> create mode 100644 arch/mips/loongson1/Makefile
>> create mode 100644 arch/mips/loongson1/Platform
>> create mode 100644 arch/mips/loongson1/common/Makefile
>> create mode 100644 arch/mips/loongson1/common/clock.c
>> create mode 100644 arch/mips/loongson1/common/irq.c
>> create mode 100644 arch/mips/loongson1/common/platform.c
>> create mode 100644 arch/mips/loongson1/common/prom.c
>> create mode 100644 arch/mips/loongson1/common/reset.c
>> create mode 100644 arch/mips/loongson1/common/setup.c
>> create mode 100644 arch/mips/loongson1/ls1b/Makefile
>> create mode 100644 arch/mips/loongson1/ls1b/board.c
>>
>> diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms
>> index 5ce8029..d64786d 100644
>> --- a/arch/mips/Kbuild.platforms
>> +++ b/arch/mips/Kbuild.platforms
>> @@ -14,6 +14,7 @@ platforms += jz4740
>> platforms += lantiq
>> platforms += lasat
>> platforms += loongson
>> +platforms += loongson1
>> platforms += mipssim
>> platforms += mti-malta
>> platforms += netlogic
>> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
>> index d9b8ea8..4c6ad4f 100644
>> --- a/arch/mips/Kconfig
>> +++ b/arch/mips/Kconfig
>> @@ -262,6 +262,17 @@ config MACH_LOONGSON
>> Chinese Academy of Sciences (CAS) in the People's Republic
>> of China. The chief architect is Professor Weiwu Hu.
>>
>> +config MACH_LOONGSON1
>> + bool "Loongson1 family of machines"
>> + select SYS_SUPPORTS_ZBOOT
>> + help
>> + This enables the support of Loongson1 family of machines.
>> +
>> + Loongson1 is a family of 32-bit MIPS-compatible SoCs.
>> + developed at Institute of Computing Technology (ICT),
>> + Chinese Academy of Sciences (CAS) in the People's Republic
>> + of China.
>> +
>> config MIPS_MALTA
>> bool "MIPS Malta board"
>> select ARCH_MAY_HAVE_PC_FDC
>> @@ -808,6 +819,7 @@ source "arch/mips/txx9/Kconfig"
>> source "arch/mips/vr41xx/Kconfig"
>> source "arch/mips/cavium-octeon/Kconfig"
>> source "arch/mips/loongson/Kconfig"
>> +source "arch/mips/loongson1/Kconfig"
>> source "arch/mips/netlogic/Kconfig"
>>
>> endmenu
>> @@ -1201,6 +1213,14 @@ config CPU_LOONGSON2F
>> have a similar programming interface with FPGA northbridge used
>> in
>> Loongson2E.
>>
>> +config CPU_LOONGSON1B
>> + bool "Loongson 1B"
>> + depends on SYS_HAS_CPU_LOONGSON1B
>> + select CPU_LOONGSON1
>> + help
>> + The Loongson 1B is a 32-bit SoC, which implements the MIPS32
>> + release 2 instruction set.
>> +
>> config CPU_MIPS32_R1
>> bool "MIPS32 Release 1"
>> depends on SYS_HAS_CPU_MIPS32_R1
>> @@ -1529,6 +1549,14 @@ config CPU_LOONGSON2
>> select CPU_SUPPORTS_64BIT_KERNEL
>> select CPU_SUPPORTS_HIGHMEM
>>
>> +config CPU_LOONGSON1
>> + bool
>> + select CPU_MIPS32
>> + select CPU_MIPSR2
>> + select CPU_HAS_PREFETCH
>> + select CPU_SUPPORTS_32BIT_KERNEL
>> + select CPU_SUPPORTS_HIGHMEM
>> +
>> config SYS_HAS_CPU_LOONGSON2E
>> bool
>>
>> @@ -1538,6 +1566,9 @@ config SYS_HAS_CPU_LOONGSON2F
>> select CPU_SUPPORTS_ADDRWINCFG if 64BIT
>> select CPU_SUPPORTS_UNCACHED_ACCELERATED
>>
>> +config SYS_HAS_CPU_LOONGSON1B
>> + bool
>> +
>> config SYS_HAS_CPU_MIPS32_R1
>> bool
>>
>> diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
>> index 5f95a4b..975f372 100644
>> --- a/arch/mips/include/asm/cpu.h
>> +++ b/arch/mips/include/asm/cpu.h
>> @@ -191,6 +191,7 @@
>> #define PRID_REV_34K_V1_0_2 0x0022
>> #define PRID_REV_LOONGSON2E 0x0002
>> #define PRID_REV_LOONGSON2F 0x0003
>> +#define PRID_REV_LOONGSON1B 0x0020
>>
>> /*
>> * Older processors used to encode processor version and revision in two
>> @@ -253,7 +254,7 @@ enum cpu_type_enum {
>> */
>> CPU_4KC, CPU_4KEC, CPU_4KSC, CPU_24K, CPU_34K, CPU_1004K, CPU_74K,
>> CPU_ALCHEMY, CPU_PR4450, CPU_BMIPS32, CPU_BMIPS3300, CPU_BMIPS4350,
>> - CPU_BMIPS4380, CPU_BMIPS5000, CPU_JZRISC,
>> + CPU_BMIPS4380, CPU_BMIPS5000, CPU_JZRISC, CPU_LOONGSON1,
>>
>> /*
>> * MIPS64 class processors
>> diff --git a/arch/mips/include/asm/mach-loongson1/irq.h
>> b/arch/mips/include/asm/mach-loongson1/irq.h
>> new file mode 100644
>> index 0000000..e8fed7a
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/irq.h
>> @@ -0,0 +1,70 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * IRQ mappings for Loongson1.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_IRQ_H
>> +#define __ASM_MACH_LOONGSON1_IRQ_H
>> +
>> +/*
>> + * CPU core Interrupt Numbers
>> + */
>> +#define MIPS_CPU_IRQ_BASE 0
>> +#define MIPS_CPU_IRQ(x) (MIPS_CPU_IRQ_BASE + (x))
>> +#define SOFTINT0_IRQ MIPS_CPU_IRQ(0)
>> +#define SOFTINT1_IRQ MIPS_CPU_IRQ(1)
>> +#define INT0_IRQ MIPS_CPU_IRQ(2)
>> +#define INT1_IRQ MIPS_CPU_IRQ(3)
>> +#define INT2_IRQ MIPS_CPU_IRQ(4)
>> +#define INT3_IRQ MIPS_CPU_IRQ(5)
>> +#define INT4_IRQ MIPS_CPU_IRQ(6)
>> +#define TIMER_IRQ MIPS_CPU_IRQ(7) /* cpu
>> timer */
>> +
>> +/*
>> + * INT0~3 Interrupt Numbers
>> + */
>> +#define LOONGSON1_IRQ_BASE 8
>> +#define LOONGSON1_IRQ(n, x) (LOONGSON1_IRQ_BASE + (n << 5) +
>> (x))
>> +
>> +#define LOONGSON1_UART0_IRQ LOONGSON1_IRQ(0, 2)
>> +#define LOONGSON1_UART1_IRQ LOONGSON1_IRQ(0, 3)
>> +#define LOONGSON1_UART2_IRQ LOONGSON1_IRQ(0, 4)
>> +#define LOONGSON1_UART3_IRQ LOONGSON1_IRQ(0, 5)
>> +#define LOONGSON1_CAN0_IRQ LOONGSON1_IRQ(0, 6)
>> +#define LOONGSON1_CAN1_IRQ LOONGSON1_IRQ(0, 7)
>> +#define LOONGSON1_SPI0_IRQ LOONGSON1_IRQ(0, 8)
>> +#define LOONGSON1_SPI1_IRQ LOONGSON1_IRQ(0, 9)
>> +#define LOONGSON1_AC97_IRQ LOONGSON1_IRQ(0, 10)
>> +#define LOONGSON1_DMA0_IRQ LOONGSON1_IRQ(0, 13)
>> +#define LOONGSON1_DMA1_IRQ LOONGSON1_IRQ(0, 14)
>> +#define LOONGSON1_DMA2_IRQ LOONGSON1_IRQ(0, 15)
>> +#define LOONGSON1_PWM0_IRQ LOONGSON1_IRQ(0, 17)
>> +#define LOONGSON1_PWM1_IRQ LOONGSON1_IRQ(0, 18)
>> +#define LOONGSON1_PWM2_IRQ LOONGSON1_IRQ(0, 19)
>> +#define LOONGSON1_PWM3_IRQ LOONGSON1_IRQ(0, 20)
>> +#define LOONGSON1_RTC_INT0_IRQ LOONGSON1_IRQ(0, 21)
>> +#define LOONGSON1_RTC_INT1_IRQ LOONGSON1_IRQ(0, 22)
>> +#define LOONGSON1_RTC_INT2_IRQ LOONGSON1_IRQ(0, 23)
>> +#define LOONGSON1_TOY_INT0_IRQ LOONGSON1_IRQ(0, 24)
>> +#define LOONGSON1_TOY_INT1_IRQ LOONGSON1_IRQ(0, 25)
>> +#define LOONGSON1_TOY_INT2_IRQ LOONGSON1_IRQ(0, 26)
>> +#define LOONGSON1_RTC_TICK_IRQ LOONGSON1_IRQ(0, 27)
>> +#define LOONGSON1_TOY_TICK_IRQ LOONGSON1_IRQ(0, 28)
>> +#define LOONGSON1_UART4_IRQ LOONGSON1_IRQ(0, 29)
>> +#define LOONGSON1_UART5_IRQ LOONGSON1_IRQ(0, 30)
>> +
>> +#define LOONGSON1_OHCI_IRQ LOONGSON1_IRQ(1, 0)
>> +#define LOONGSON1_EHCI_IRQ LOONGSON1_IRQ(1, 1)
>> +#define LOONGSON1_GMAC0_IRQ LOONGSON1_IRQ(1, 2)
>> +#define LOONGSON1_GMAC1_IRQ LOONGSON1_IRQ(1, 3)
>> +
>> +#define NR_IRQS LOONGSON1_GMAC1_IRQ
>
> Are you using TAB above?

Yes.
The mail did not show it correctly.

>> +
>> +#endif /* __ASM_MACH_LOONGSON1_IRQ_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/loongson1.h
>> b/arch/mips/include/asm/mach-loongson1/loongson1.h
>> new file mode 100644
>> index 0000000..466136d
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/loongson1.h
>> @@ -0,0 +1,48 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * Register mappings for Loongson1.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_LOONGSON1_H
>> +#define __ASM_MACH_LOONGSON1_LOONGSON1_H
>> +
>> +#define DEFAULT_MEMSIZE (256) /* If no memsize
>> provided */
>> +
>> +/* Loongson1 Register Bases */
>> +/* All regs are accessed in KSEG1 */
>> +#define LOONGSON1_REGBASE (0xa0000000ul + 0x1fe00000ul)
>> +
>> +#define LOONGSON1_INTC_BASE (0xbfd01040)
>> +#define LOONGSON1_USB_BASE (0xbfe00000)
>> +#define LOONGSON1_GMAC0_BASE (0xbfe10000)
>> +#define LOONGSON1_GMAC1_BASE (0xbfe20000)
>> +#define LOONGSON1_UART0_BASE (0xbfe40000)
>> +#define LOONGSON1_UART1_BASE (0xbfe44000)
>> +#define LOONGSON1_UART2_BASE (0xbfe48000)
>> +#define LOONGSON1_UART3_BASE (0xbfe4c000)
>> +#define LOONGSON1_UART4_BASE (0xbfe6c000)
>> +#define LOONGSON1_UART5_BASE (0xbfe7c000)
>> +#define LOONGSON1_CAN0_BASE (0xbfe50000)
>> +#define LOONGSON1_CAN1_BASE (0xbfe54000)
>> +#define LOONGSON1_I2C0_BASE (0xbfe58000)
>> +#define LOONGSON1_I2C1_BASE (0xbfe68000)
>> +#define LOONGSON1_I2C2_BASE (0xbfe70000)
>> +#define LOONGSON1_PWM_BASE (0xbfe5c000)
>> +#define LOONGSON1_WDT_BASE (0xbfe5c060)
>> +#define LOONGSON1_RTC_BASE (0xbfe64000)
>> +#define LOONGSON1_AC97_BASE (0xbfe74000)
>> +#define LOONGSON1_NAND_BASE (0xbfe78000)
>> +#define LOONGSON1_CLK_BASE (0xbfe78030)
>> +
>> +#include <regs-clk.h>
>> +#include <regs-intc.h>
>> +#include <regs-wdt.h>
>> +
>> +#endif /* __ASM_MACH_LOONGSON1_LOONGSON1_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/platform.h
>> b/arch/mips/include/asm/mach-loongson1/platform.h
>> new file mode 100644
>> index 0000000..db4f02e
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/platform.h
>> @@ -0,0 +1,20 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_PLATFORM_H
>> +#define __ASM_MACH_LOONGSON1_PLATFORM_H
>> +
>> +#include <linux/platform_device.h>
>> +
>> +extern struct platform_device loongson1_uart_device;
>> +
>> +void loongson1_serial_setup(void);
>> +
>> +#endif /* __ASM_MACH_LOONGSON1_PLATFORM_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/prom.h
>> b/arch/mips/include/asm/mach-loongson1/prom.h
>> new file mode 100644
>> index 0000000..b871dc4
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/prom.h
>> @@ -0,0 +1,24 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_PROM_H
>> +#define __ASM_MACH_LOONGSON1_PROM_H
>> +
>> +#include <linux/io.h>
>> +#include <linux/init.h>
>> +#include <linux/irq.h>
>> +
>> +/* environment arguments from bootloader */
>> +extern unsigned long memsize, highmemsize;
>> +
>> +/* loongson-specific command line, env and memory initialization */
>> +extern char *prom_getenv(char *name);
>> +extern void __init prom_init_cmdline(void);
>> +
>> +#endif /* __ASM_MACH_LOONGSON1_PROM_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/regs-clk.h
>> b/arch/mips/include/asm/mach-loongson1/regs-clk.h
>> new file mode 100644
>> index 0000000..7a09d6a
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/regs-clk.h
>> @@ -0,0 +1,32 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * Loongson1 Clock Register Definitions.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_REGS_CLK_H
>> +#define __ASM_MACH_LOONGSON1_REGS_CLK_H
>> +
>> +#define LS1_CLK_REG(x) ((void __iomem *)(LOONGSON1_CLK_BASE +
>> (x)))
>
> "volatile" keyword may be required for __iomem access, the same to the
> following similar usage.
>
> Considering a scene is(LS1_XXX_REG(X) doesn't really exist):
>
> LS1_XXX_REG(X) = 0; /* put cpu into idle and wait interrupt */
> LS1_XXX_REG(X) = 7; /* recover the cpu frequency to the highest
> */
>
> If no "volatile" keyword indicated, the above two lines will be
> intelligently but wrongly removed by compiler.
>
>> +
>> +#define LS1_CLK_PLL_FREQ LS1_CLK_REG(0x0)
>> +#define LS1_CLK_PLL_DIV LS1_CLK_REG(0x4)
>> +
>> +/* Clock PLL Divisor Register Bits */
>> +#define DIV_DC_EN (0x1 << 31)
>> +#define DIV_DC (0x1f << 26)
>> +#define DIV_CPU_EN (0x1 << 25)
>> +#define DIV_CPU (0x1f << 20)
>> +#define DIV_DDR_EN (0x1 << 19)
>> +#define DIV_DDR (0x1f << 14)
>
> The above exist format violation, SPACE, TAB?

Fixed in the new patch.

>> +
>> +#define DIV_DC_SHIFT (26)
>> +#define DIV_CPU_SHIFT (20)
>> +#define DIV_DDR_SHIFT (14)
>
> parenthesis may be not required for the scenes.

Fixed in the new patch.

>> +
>> +#endif /* __ASM_MACH_LOONGSON1_REGS_CLK_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/regs-intc.h
>> b/arch/mips/include/asm/mach-loongson1/regs-intc.h
>> new file mode 100644
>> index 0000000..3c62411
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/regs-intc.h
>> @@ -0,0 +1,25 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * Loongson1 Interrupt register definitions.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_REGS_INTC_H
>> +#define __ASM_MACH_LOONGSON1_REGS_INTC_H
>> +
>> +#define LS1_INTC_REG(x) ((void __iomem
>> *)(LOONGSON1_INTC_BASE \
>> + + n * 0x18 + x))
>
>
> This may be better:
>
> #define LS1_INTC_REG(x) \
> ((volatile void __iomem *)(LOONGSON1_INTC_BASE + (n * 0x18) + x))

Fixed in the new patch.

>> +
>> +#define LS1_INTC_INTISR(n) LS1_INTC_REG(0x0)
>> +#define LS1_INTC_INTIEN(n) LS1_INTC_REG(0x4)
>> +#define LS1_INTC_INTSET(n) LS1_INTC_REG(0x8)
>> +#define LS1_INTC_INTCLR(n) LS1_INTC_REG(0xc)
>> +#define LS1_INTC_INTPOL(n) LS1_INTC_REG(0x10)
>> +#define LS1_INTC_INTEDGE(n) LS1_INTC_REG(0x14)
>> +
>> +#endif /* __ASM_MACH_LOONGSON1_REGS_INTC_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/regs-wdt.h
>> b/arch/mips/include/asm/mach-loongson1/regs-wdt.h
>> new file mode 100644
>> index 0000000..2393dd7
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/regs-wdt.h
>> @@ -0,0 +1,21 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * Loongson1 Watchdog register definitions.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#ifndef __ASM_MACH_LOONGSON1_REGS_WDT_H
>> +#define __ASM_MACH_LOONGSON1_REGS_WDT_H
>> +
>> +#define LS1_WDT_REG(x) ((void __iomem *)(LOONGSON1_WDT_BASE +
>> (x)))
>> +
>> +#define LS1_WDT_EN LS1_WDT_REG(0x0)
>> +#define LS1_WDT_SET LS1_WDT_REG(0x4)
>> +#define LS1_WDT_TIMER LS1_WDT_REG(0x8)
>> +
>> +#endif /* __ASM_MACH_LOONGSON1_REGS_WDT_H */
>> diff --git a/arch/mips/include/asm/mach-loongson1/war.h
>> b/arch/mips/include/asm/mach-loongson1/war.h
>> new file mode 100644
>> index 0000000..e3680a8
>> --- /dev/null
>> +++ b/arch/mips/include/asm/mach-loongson1/war.h
>> @@ -0,0 +1,25 @@
>> +/*
>> + * This file is subject to the terms and conditions of the GNU General
>> Public
>> + * License. See the file "COPYING" in the main directory of this archive
>> + * for more details.
>> + *
>> + * Copyright (C) 2002, 2004, 2007 by Ralf Baechle <ralf@linux-mips.org>
>> + */
>> +#ifndef __ASM_MACH_LOONGSON1_WAR_H
>> +#define __ASM_MACH_LOONGSON1_WAR_H
>> +
>> +#define R4600_V1_INDEX_ICACHEOP_WAR 0
>> +#define R4600_V1_HIT_CACHEOP_WAR 0
>> +#define R4600_V2_HIT_CACHEOP_WAR 0
>> +#define R5432_CP0_INTERRUPT_WAR 0
>> +#define BCM1250_M3_WAR 0
>> +#define SIBYTE_1956_WAR 0
>> +#define MIPS4K_ICACHE_REFILL_WAR 0
>> +#define MIPS_CACHE_SYNC_WAR 0
>> +#define TX49XX_ICACHE_INDEX_INV_WAR 0
>> +#define RM9000_CDEX_SMP_WAR 0
>> +#define ICACHE_REFILLS_WORKAROUND_WAR 0
>> +#define R10000_LLSC_WAR 0
>> +#define MIPS34K_MISSED_ITLB_WAR 0
>> +
>> +#endif /* __ASM_MACH_LOONGSON1_WAR_H */
>> diff --git a/arch/mips/include/asm/module.h
>> b/arch/mips/include/asm/module.h
>> index bc01a02..b53d642 100644
>> --- a/arch/mips/include/asm/module.h
>> +++ b/arch/mips/include/asm/module.h
>> @@ -116,6 +116,8 @@ search_module_dbetables(unsigned long addr)
>> #define MODULE_PROC_FAMILY "SB1 "
>> #elif defined CONFIG_CPU_LOONGSON2
>> #define MODULE_PROC_FAMILY "LOONGSON2 "
>> +#elif defined CONFIG_CPU_LOONGSON1
>> +#define MODULE_PROC_FAMILY "LOONGSON1 "
>> #elif defined CONFIG_CPU_CAVIUM_OCTEON
>> #define MODULE_PROC_FAMILY "OCTEON "
>> #elif defined CONFIG_CPU_XLR
>> diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
>> index 664bc13..98d4235 100644
>> --- a/arch/mips/kernel/cpu-probe.c
>> +++ b/arch/mips/kernel/cpu-probe.c
>> @@ -37,6 +37,8 @@
>> void (*cpu_wait)(void);
>> EXPORT_SYMBOL(cpu_wait);
>>
>> +static void __cpuinit decode_configs(struct cpuinfo_mips *c);
>> +
>> static void r3081_wait(void)
>> {
>> unsigned long cfg = read_c0_conf();
>> @@ -191,6 +193,7 @@ void __init check_wait(void)
>> case CPU_CAVIUM_OCTEON2:
>> case CPU_JZRISC:
>> case CPU_XLR:
>> + case CPU_LOONGSON1:
>> cpu_wait = r4k_wait;
>> break;
>>
>> @@ -636,6 +639,18 @@ static inline void cpu_probe_legacy(struct
>> cpuinfo_mips *c, unsigned int cpu)
>> MIPS_CPU_32FPR;
>> c->tlbsize = 64;
>> break;
>> + case PRID_IMP_LOONGSON1:
>> + decode_configs(c);
>> +
>> + c->cputype = CPU_LOONGSON1;
>> +
>> + switch (c->processor_id & PRID_REV_MASK) {
>> + case PRID_REV_LOONGSON1B:
>> + __cpu_name[cpu] = "Loongson 1B";
>> + break;
>> + }
>> +
>> + break;
>> }
>> }
>>
>> diff --git a/arch/mips/kernel/perf_event_mipsxx.c
>> b/arch/mips/kernel/perf_event_mipsxx.c
>> index e5ad09a..e316b0e 100644
>> --- a/arch/mips/kernel/perf_event_mipsxx.c
>> +++ b/arch/mips/kernel/perf_event_mipsxx.c
>> @@ -1062,6 +1062,12 @@ init_hw_perf_events(void)
>> mipsxxcore_pmu.irq = irq;
>> mipspmu = &mipsxxcore_pmu;
>> break;
>> + case CPU_LOONGSON1:
>> + mipsxxcore_pmu.name = "mips/loongson1";
>> + mipsxxcore_pmu.num_counters = counters;
>> + mipsxxcore_pmu.irq = irq;
>> + mipspmu = &mipsxxcore_pmu;
>> + break;
>> default:
>> pr_cont("Either hardware does not support performance "
>> "counters, or not yet implemented.\n");
>> diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
>> index 01eff7e..cd55823 100644
>> --- a/arch/mips/kernel/traps.c
>> +++ b/arch/mips/kernel/traps.c
>> @@ -1241,6 +1241,7 @@ static inline void parity_protection_init(void)
>> break;
>>
>> case CPU_5KC:
>> + case CPU_LOONGSON1:
>> write_c0_ecc(0x80000000);
>> back_to_back_c0_hazard();
>> /* Set the PE bit (bit 31) in the c0_errctl register. */
>> diff --git a/arch/mips/loongson1/Kconfig b/arch/mips/loongson1/Kconfig
>> new file mode 100644
>> index 0000000..237fa21
>> --- /dev/null
>> +++ b/arch/mips/loongson1/Kconfig
>> @@ -0,0 +1,21 @@
>> +if MACH_LOONGSON1
>> +
>> +choice
>> + prompt "Machine Type"
>> +
>> +config LOONGSON1_LS1B
>> + bool "Loongson LS1B board"
>> + select CEVT_R4K
>> + select CSRC_R4K
>> + select SYS_HAS_CPU_LOONGSON1B
>> + select DMA_NONCOHERENT
>> + select BOOT_ELF32
>> + select IRQ_CPU
>> + select SYS_SUPPORTS_32BIT_KERNEL
>> + select SYS_SUPPORTS_LITTLE_ENDIAN
>> + select SYS_SUPPORTS_HIGHMEM
>> + select SYS_HAS_EARLY_PRINTK
>> +
>> +endchoice
>> +
>> +endif # MACH_LOONGSON1
>> diff --git a/arch/mips/loongson1/Makefile b/arch/mips/loongson1/Makefile
>> new file mode 100644
>> index 0000000..e9123c2
>> --- /dev/null
>> +++ b/arch/mips/loongson1/Makefile
>> @@ -0,0 +1,11 @@
>> +#
>> +# Common code for all Loongson1 based systems
>> +#
>> +
>> +obj-$(CONFIG_MACH_LOONGSON1) += common/
>> +
>> +#
>> +# Loongson LS1B board
>> +#
>> +
>> +obj-$(CONFIG_LOONGSON1_LS1B) += ls1b/
>> diff --git a/arch/mips/loongson1/Platform b/arch/mips/loongson1/Platform
>> new file mode 100644
>> index 0000000..92804c6
>> --- /dev/null
>> +++ b/arch/mips/loongson1/Platform
>> @@ -0,0 +1,7 @@
>> +cflags-$(CONFIG_CPU_LOONGSON1) += \
>> + $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA
>> -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
>> + -Wa,-mips32r2 -Wa,--trap
>> +
>> +platform-$(CONFIG_MACH_LOONGSON1) += loongson1/
>> +cflags-$(CONFIG_MACH_LOONGSON1) +=
>> -I$(srctree)/arch/mips/include/asm/mach-loongson1
>> +load-$(CONFIG_LOONGSON1_LS1B) += 0xffffffff80010000
>> diff --git a/arch/mips/loongson1/common/Makefile
>> b/arch/mips/loongson1/common/Makefile
>> new file mode 100644
>> index 0000000..b279770
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/Makefile
>> @@ -0,0 +1,5 @@
>> +#
>> +# Makefile for common code of loongson1 based machines.
>> +#
>> +
>> +obj-y += clock.o irq.o platform.o prom.o reset.o setup.o
>> diff --git a/arch/mips/loongson1/common/clock.c
>> b/arch/mips/loongson1/common/clock.c
>> new file mode 100644
>> index 0000000..7f4f28b
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/clock.c
>> @@ -0,0 +1,165 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/list.h>
>> +#include <linux/mutex.h>
>> +#include <linux/clk.h>
>> +#include <linux/err.h>
>> +#include <asm/clock.h>
>> +#include <asm/time.h>
>> +
>> +#include <loongson1.h>
>> +
>> +static LIST_HEAD(clocks);
>> +static DEFINE_MUTEX(clocks_mutex);
>> +
>> +struct clk *clk_get(struct device *dev, const char *name)
>> +{
>> + struct clk *c;
>> + struct clk *ret = NULL;
>> +
>> + mutex_lock(&clocks_mutex);
>> + list_for_each_entry(c, &clocks, node) {
>> + if (!strcmp(c->name, name)) {
>> + ret = c;
>> + break;
>> + }
>> + }
>> + mutex_unlock(&clocks_mutex);
>> +
>> + return ret;
>> +}
>> +EXPORT_SYMBOL(clk_get);
>> +
>> +unsigned long clk_get_rate(struct clk *clk)
>> +{
>> + return clk->rate;
>> +}
>> +EXPORT_SYMBOL(clk_get_rate);
>> +
>> +static void pll_clk_init(struct clk *clk)
>> +{
>> + u32 pll;
>> +
>> + pll = __raw_readl(LS1_CLK_PLL_FREQ);
>> + clk->rate = (12 + (pll & 0x3f)) * 33 / 2
>> + + ((pll >> 8) & 0x3ff) * 33 / 1024 / 2;
>> + clk->rate *= 1000000;
>> +}
>> +
>> +static void cpu_clk_init(struct clk *clk)
>> +{
>> + u32 pll, ctrl;
>> +
>> + pll = clk_get_rate(clk->parent);
>> + ctrl = __raw_readl(LS1_CLK_PLL_DIV) & DIV_CPU;
>> + clk->rate = pll / (ctrl >> DIV_CPU_SHIFT);
>> +}
>> +
>> +static void ddr_clk_init(struct clk *clk)
>> +{
>> + u32 pll, ctrl;
>> +
>> + pll = clk_get_rate(clk->parent);
>> + ctrl = __raw_readl(LS1_CLK_PLL_DIV) & DIV_DDR;
>> + clk->rate = pll / (ctrl >> DIV_DDR_SHIFT);
>> +}
>> +
>> +static void dc_clk_init(struct clk *clk)
>> +{
>> + u32 pll, ctrl;
>> +
>> + pll = clk_get_rate(clk->parent);
>> + ctrl = __raw_readl(LS1_CLK_PLL_DIV) & DIV_DC;
>> + clk->rate = pll / (ctrl >> DIV_DC_SHIFT);
>> +}
>> +
>> +static struct clk_ops pll_clk_ops = {
>> + .init = pll_clk_init,
>> +};
>> +
>> +static struct clk_ops cpu_clk_ops = {
>> + .init = cpu_clk_init,
>> +};
>> +
>> +static struct clk_ops ddr_clk_ops = {
>> + .init = ddr_clk_init,
>> +};
>> +
>> +static struct clk_ops dc_clk_ops = {
>> + .init = dc_clk_init,
>> +};
>> +
>> +static struct clk pll_clk = {
>> + .name = "pll",
>> + .ops = &pll_clk_ops,
>> +};
>> +
>> +static struct clk cpu_clk = {
>> + .name = "cpu",
>> + .parent = &pll_clk,
>> + .ops = &cpu_clk_ops,
>> +};
>> +
>> +static struct clk ddr_clk = {
>> + .name = "ddr",
>> + .parent = &pll_clk,
>> + .ops = &ddr_clk_ops,
>> +};
>> +
>> +static struct clk dc_clk = {
>> + .name = "dc",
>> + .parent = &pll_clk,
>> + .ops = &dc_clk_ops,
>> +};
>> +
>> +int clk_register(struct clk *clk)
>> +{
>> + mutex_lock(&clocks_mutex);
>> + list_add(&clk->node, &clocks);
>> + if (clk->ops->init)
>> + clk->ops->init(clk);
>> + mutex_unlock(&clocks_mutex);
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL(clk_register);
>> +
>> +static struct clk *loongson1_clks[] = {
>> + &pll_clk,
>> + &cpu_clk,
>> + &ddr_clk,
>> + &dc_clk,
>> +};
>> +
>> +int __init loongson1_clock_init(void)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(loongson1_clks); i++)
>> + clk_register(loongson1_clks[i]);
>> +
>> + return 0;
>> +}
>> +
>> +void __init plat_time_init(void)
>> +{
>> + struct clk *clk;
>> +
>> + /* Initialize loongson1 clocks */
>> + loongson1_clock_init();
>> +
>> + /* setup mips r4k timer */
>> + clk = clk_get(NULL, "cpu");
>> + if (IS_ERR(clk))
>> + panic("unable to get dc clock, err=%ld", PTR_ERR(clk));
>> +
>> + mips_hpt_frequency = clk_get_rate(clk) / 2;
>> +}
>> diff --git a/arch/mips/loongson1/common/irq.c
>> b/arch/mips/loongson1/common/irq.c
>> new file mode 100644
>> index 0000000..a5dcabb
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/irq.c
>> @@ -0,0 +1,136 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/interrupt.h>
>> +#include <linux/irq.h>
>> +#include <asm/irq_cpu.h>
>> +
>> +#include <loongson1.h>
>> +#include <irq.h>
>> +
>> +static void loongson1_irq_ack(struct irq_data *d)
>> +{
>> + unsigned int bit = (d->irq - LOONGSON1_IRQ_BASE) & 0x1f;
>> + unsigned int n = (d->irq - LOONGSON1_IRQ_BASE) >> 5;
>> +
>> + __raw_writel(__raw_readl(LS1_INTC_INTCLR(n))
>> + | (1 << bit), LS1_INTC_INTCLR(n));
>> +}
>> +
>> +static void loongson1_irq_mask(struct irq_data *d)
>> +{
>> + unsigned int bit = (d->irq - LOONGSON1_IRQ_BASE) & 0x1f;
>> + unsigned int n = (d->irq - LOONGSON1_IRQ_BASE) >> 5;
>> +
>> + __raw_writel(__raw_readl(LS1_INTC_INTIEN(n))
>> + & ~(1 << bit), LS1_INTC_INTIEN(n));
>> +}
>> +
>> +static void loongson1_irq_mask_ack(struct irq_data *d)
>> +{
>> + unsigned int bit = (d->irq - LOONGSON1_IRQ_BASE) & 0x1f;
>> + unsigned int n = (d->irq - LOONGSON1_IRQ_BASE) >> 5;
>> +
>> + __raw_writel(__raw_readl(LS1_INTC_INTIEN(n))
>> + & ~(1 << bit), LS1_INTC_INTIEN(n));
>> + __raw_writel(__raw_readl(LS1_INTC_INTCLR(n))
>> + | (1 << bit), LS1_INTC_INTCLR(n));
>> +}
>> +
>> +static void loongson1_irq_unmask(struct irq_data *d)
>> +{
>> + unsigned int bit = (d->irq - LOONGSON1_IRQ_BASE) & 0x1f;
>> + unsigned int n = (d->irq - LOONGSON1_IRQ_BASE) >> 5;
>> +
>> + __raw_writel(__raw_readl(LS1_INTC_INTIEN(n))
>> + | (1 << bit), LS1_INTC_INTIEN(n));
>> +}
>> +
>> +static struct irq_chip loongson1_irq_chip = {
>> + .name = "LOONGSON1-INTC",
>> + .irq_ack = loongson1_irq_ack,
>> + .irq_mask = loongson1_irq_mask,
>> + .irq_mask_ack = loongson1_irq_mask_ack,
>> + .irq_unmask = loongson1_irq_unmask,
>> +};
>> +
>> +static void loongson1_irq_dispatch(int n)
>> +{
>> + u32 int_status, irq;
>> +
>> + /* Get pending sources, masked by current enables */
>> + int_status = __raw_readl(LS1_INTC_INTISR(n)) &
>> + __raw_readl(LS1_INTC_INTIEN(n));
>> +
>> + if (int_status) {
>> + irq = LOONGSON1_IRQ(n, __ffs(int_status));
>> + do_IRQ(irq);
>> + }
>> +}
>> +
>> +asmlinkage void plat_irq_dispatch(void)
>> +{
>> + unsigned int pending;
>> +
>> + pending = read_c0_cause() & read_c0_status() & ST0_IM;
>> +
>> + if (pending & CAUSEF_IP7)
>> + do_IRQ(TIMER_IRQ);
>> + else if (pending & CAUSEF_IP2)
>> + loongson1_irq_dispatch(0); /* INT0 */
>> + else if (pending & CAUSEF_IP3)
>> + loongson1_irq_dispatch(1); /* INT1 */
>> + else if (pending & CAUSEF_IP4)
>> + loongson1_irq_dispatch(2); /* INT2 */
>> + else if (pending & CAUSEF_IP5)
>> + loongson1_irq_dispatch(3); /* INT3 */
>> + else if (pending & CAUSEF_IP6)
>> + loongson1_irq_dispatch(4); /* INT4 */
>> + else
>> + spurious_interrupt();
>> +
>> +}
>> +
>> +struct irqaction cascade_irqaction = {
>> + .handler = no_action,
>> + .name = "cascade",
>> + .flags = IRQF_NO_THREAD,
>> +};
>> +
>> +static void __init loongson1_irq_init(int base)
>> +{
>> + int n;
>> +
>> + /* Disable interrupts and clear pending,
>> + * setup all IRQs as high level triggered
>> + */
>> + for (n = 0; n < 4; n++) {
>> + __raw_writel(0x0, LS1_INTC_INTIEN(n));
>> + __raw_writel(0xffffffff, LS1_INTC_INTCLR(n));
>> + __raw_writel(0xffffffff, LS1_INTC_INTPOL(n));
>> + __raw_writel(0x0, LS1_INTC_INTEDGE(n));
>> + }
>> +
>> +
>> + for (n = base; n < NR_IRQS; n++) {
>> + irq_set_chip_and_handler(n, &loongson1_irq_chip,
>> + handle_level_irq);
>> + }
>> +
>> + setup_irq(INT0_IRQ, &cascade_irqaction);
>> + setup_irq(INT1_IRQ, &cascade_irqaction);
>> + setup_irq(INT2_IRQ, &cascade_irqaction);
>> + setup_irq(INT3_IRQ, &cascade_irqaction);
>> +}
>> +
>> +void __init arch_init_irq(void)
>> +{
>> + mips_cpu_irq_init();
>> + loongson1_irq_init(LOONGSON1_IRQ_BASE);
>> +}
>> diff --git a/arch/mips/loongson1/common/platform.c
>> b/arch/mips/loongson1/common/platform.c
>> new file mode 100644
>> index 0000000..c93028e
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/platform.c
>> @@ -0,0 +1,50 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/err.h>
>> +#include <linux/serial_8250.h>
>> +
>> +#include <loongson1.h>
>> +
>> +#define LOONGSON1_UART_PORT(_id) \
>> + { \
>> + .mapbase = LOONGSON1_UART ## _id ## _BASE, \
>> + .membase = (void *)(LOONGSON1_UART ## _id ##
>> _BASE), \
>> + .irq = LOONGSON1_UART ## _id ## _IRQ, \
>> + .iotype = UPIO_MEM, \
>> + .flags = UPF_BOOT_AUTOCONF | UPF_FIXED_TYPE, \
>> + .type = PORT_16550A, \
>> + }
>> +
>> +static struct plat_serial8250_port loongson1_serial8250_port[] = {
>> + LOONGSON1_UART_PORT(0),
>> + {},
>> +};
>> +
>> +struct platform_device loongson1_uart_device = {
>> + .name = "serial8250",
>> + .id = PLAT8250_DEV_PLATFORM,
>> + .dev = {
>> + .platform_data = loongson1_serial8250_port,
>> + },
>> +};
>> +
>> +void __init loongson1_serial_setup(void)
>> +{
>> + struct clk *clk;
>> + struct plat_serial8250_port *p;
>> +
>> + clk = clk_get(NULL, "dc");
>> + if (IS_ERR(clk))
>> + panic("unable to get dc clock, err=%ld", PTR_ERR(clk));
>> +
>> + for (p = loongson1_serial8250_port; p->flags != 0; ++p)
>> + p->uartclk = clk_get_rate(clk);
>> +}
>> diff --git a/arch/mips/loongson1/common/prom.c
>> b/arch/mips/loongson1/common/prom.c
>> new file mode 100644
>> index 0000000..70791f1
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/prom.c
>> @@ -0,0 +1,88 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * Modified from arch/mips/pnx833x/common/prom.c.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/serial_reg.h>
>> +#include <asm/bootinfo.h>
>> +
>> +#include <loongson1.h>
>> +#include <prom.h>
>> +
>> +int prom_argc;
>> +char **prom_argv, **prom_envp;
>> +unsigned long memsize, highmemsize;
>> +
>> +char *prom_getenv(char *envname)
>> +{
>> + char **env = prom_envp;
>> + int i;
>> +
>> + i = strlen(envname);
>> +
>> + while (*env) {
>> + if (strncmp(envname, *env, i) == 0 && *(*env+i) == '=')
>> + return *env + i + 1;
>> + env++;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static inline unsigned long env_or_default(char *env, unsigned long dfl)
>> +{
>> + char *str = prom_getenv(env);
>> + return str ? simple_strtol(str, 0, 0) : dfl;
>> +}
>> +
>> +void __init prom_init_cmdline(void)
>> +{
>> + char *c = &(arcs_cmdline[0]);
>> + int i;
>> +
>> + for (i = 1; i < prom_argc; i++) {
>> + strcpy(c, prom_argv[i]);
>> + c += strlen(prom_argv[i]);
>> + if (i < prom_argc-1)
>> + *c++ = ' ';
>> + }
>> + *c = 0;
>> +}
>> +
>> +void __init prom_init(void)
>> +{
>> + prom_argc = fw_arg0;
>> + prom_argv = (char **)fw_arg1;
>> + prom_envp = (char **)fw_arg2;
>> +
>> + prom_init_cmdline();
>> +
>> + memsize = env_or_default("memsize", DEFAULT_MEMSIZE);
>> + highmemsize = env_or_default("highmemsize", 0x0);
>> +}
>> +
>> +void __init prom_free_prom_memory(void)
>> +{
>> +}
>> +
>> +#define UART_BASE LOONGSON1_UART0_BASE
>> +#define PORT(base, offset) (u8 *)(base + offset)
>> +
>> +void __init prom_putchar(char c)
>> +{
>> + int timeout;
>> +
>> + timeout = 1024;
>> +
>> + while (((readb(PORT(UART_BASE, UART_LSR)) & UART_LSR_THRE) == 0)
>> + && (timeout-- > 0))
>> + ;
>> +
>> + writeb(c, PORT(UART_BASE, UART_TX));
>> +}
>> diff --git a/arch/mips/loongson1/common/reset.c
>> b/arch/mips/loongson1/common/reset.c
>> new file mode 100644
>> index 0000000..75f550f
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/reset.c
>> @@ -0,0 +1,46 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <linux/io.h>
>> +#include <linux/pm.h>
>> +#include <asm/reboot.h>
>> +
>> +#include <loongson1.h>
>> +
>> +static void loongson1_restart(char *command)
>> +{
>> + __raw_writel(0x1, LS1_WDT_EN);
>> + __raw_writel(0x5000000, LS1_WDT_TIMER);
>> + __raw_writel(0x1, LS1_WDT_SET);
>> +}
>> +
>> +static void loongson1_halt(void)
>> +{
>> + pr_notice("\n\n** You can safely turn off the power now **\n\n");
>> + while (1) {
>> + if (cpu_wait)
>> + cpu_wait();
>> + }
>> +}
>> +
>> +static void loongson1_power_off(void)
>> +{
>> + loongson1_halt();
>> +}
>> +
>> +static int __init loongson1_reboot_setup(void)
>> +{
>> + _machine_restart = loongson1_restart;
>> + _machine_halt = loongson1_halt;
>> + pm_power_off = loongson1_power_off;
>> +
>> + return 0;
>> +}
>> +
>> +arch_initcall(loongson1_reboot_setup);
>> diff --git a/arch/mips/loongson1/common/setup.c
>> b/arch/mips/loongson1/common/setup.c
>> new file mode 100644
>> index 0000000..62128cc
>> --- /dev/null
>> +++ b/arch/mips/loongson1/common/setup.c
>> @@ -0,0 +1,29 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <asm/bootinfo.h>
>> +
>> +#include <prom.h>
>> +
>> +void __init plat_mem_setup(void)
>> +{
>> + add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
>> +}
>> +
>> +const char *get_system_type(void)
>> +{
>> + unsigned int processor_id = (&current_cpu_data)->processor_id;
>> +
>> + switch (processor_id & PRID_REV_MASK) {
>> + case PRID_REV_LOONGSON1B:
>> + return "LOONGSON LS1B";
>> + default:
>> + return "LOONGSON (unknown)";
>> + }
>> +}
>> diff --git a/arch/mips/loongson1/ls1b/Makefile
>> b/arch/mips/loongson1/ls1b/Makefile
>> new file mode 100644
>> index 0000000..891eac4
>> --- /dev/null
>> +++ b/arch/mips/loongson1/ls1b/Makefile
>> @@ -0,0 +1,5 @@
>> +#
>> +# Makefile for loongson1B based machines.
>> +#
>> +
>> +obj-y += board.o
>> diff --git a/arch/mips/loongson1/ls1b/board.c
>> b/arch/mips/loongson1/ls1b/board.c
>> new file mode 100644
>> index 0000000..b1a602f
>> --- /dev/null
>> +++ b/arch/mips/loongson1/ls1b/board.c
>> @@ -0,0 +1,30 @@
>> +/*
>> + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> it
>> + * under the terms of the GNU General Public License as published by
>> the
>> + * Free Software Foundation; either version 2 of the License, or (at
>> your
>> + * option) any later version.
>> + */
>> +
>> +#include <platform.h>
>> +
>> +#include <linux/serial_8250.h>
>> +#include <loongson1.h>
>> +
>> +static struct platform_device *loongson1_platform_devices[] __initdata =
>> {
>> + &loongson1_uart_device,
>> +};
>> +
>> +static int __init loongson1_platform_init(void)
>> +{
>> + int err;
>> +
>> + loongson1_serial_setup();
>> +
>> + err = platform_add_devices(loongson1_platform_devices,
>> +
>> ARRAY_SIZE(loongson1_platform_devices));
>> + return err;
>> +}
>> +
>> +arch_initcall(loongson1_platform_init);
>> diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c
>> index d1f2d4c..99216f0 100644
>> --- a/arch/mips/oprofile/common.c
>> +++ b/arch/mips/oprofile/common.c
>> @@ -89,6 +89,7 @@ int __init oprofile_arch_init(struct oprofile_operations
>> *ops)
>> case CPU_R10000:
>> case CPU_R12000:
>> case CPU_R14000:
>> + case CPU_LOONGSON1:
>> lmodel = &op_model_mipsxx_ops;
>> break;
>>
>> diff --git a/arch/mips/oprofile/op_model_mipsxx.c
>> b/arch/mips/oprofile/op_model_mipsxx.c
>> index 54759f1..03be670 100644
>> --- a/arch/mips/oprofile/op_model_mipsxx.c
>> +++ b/arch/mips/oprofile/op_model_mipsxx.c
>> @@ -365,6 +365,10 @@ static int __init mipsxx_init(void)
>> op_model_mipsxx_ops.cpu_type = "mips/sb1";
>> break;
>>
>> + case CPU_LOONGSON1:
>> + op_model_mipsxx_ops.cpu_type = "mips/loongson1";
>> + break;
>> +
>> default:
>> printk(KERN_ERR "Profiling unsupported for this CPU\n");
>
> Regards,
> Wu Zhangjin
>
>>
>> --
>> 1.7.4.1
>>
>>
>


--
Best Regards!
Kelvin


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