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[PATCH 2/6] mips: Add N64 machine type Message-Id: <20201225190016.286a0dfe49385f2bc39d04d4@gmx.com> X-Mailer: Sylpheed 3.5.0 (GTK+ 2.18.6; x86_64-unknown-linux-gnu) Mime-Version: 1.0 X-Provags-ID: V03:K1:lE4j6cFjs+P1HuonD+3Ey93+YZhCoD5F0s/+T0Xtd4cVGiAOiez heD/0W+NnIqYn+PGMvtoUbXg5vGQsrVYEciaYnx7Sq9dBXyOpoGz9F5Vh8eKa+VqCcpua9G rAozkgx958W8mA8SQaPT+UuGjpoPntwh8em1CMWo92g5bF/0lffiVc9qMaQPv14FQNyxf18 pLx94cuY5msLiFENQ3EMQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:yVYlYFcIi/Q=:1FsxoczhuWOk9TYxzy6Lii PvakDtd8X39oUvP5kybZWhz/PuIIKnGnGggJtUrxMxdZpdiDd8XWAXs/q/Hn9SEz7JNGlWyPU StkfrKpfuIjJ5p8wOc6r1eLBo94qiYkTIDSBZkdy8ureO+sGi/autVbddZwG2TMsw5c71u7vl wrD/9PehDUzpo69GZgz87Ro9K/wq1ejPSl869G9ln9bJjWQcmsXmHD6TuGM9iJ1xzLqdPoCpQ ZQKQYiTugGhdkIVKfFn7cRevXfvSRZEFX040Y89DLqPBLsbFpKH2Axb9OCKXBvegmGVPfcxNH NHZmvDaIJk0WRzJO85v3+hP7XtLpSuEwJmGLiWThkYBZWLaWJUUszvfd5FlvpPMfaX0j0Wc3u QFFzqiPTS/Jd0gCaxT2B5F0boNkpsUYz/tkDhsD8erro66AKglV6hjF2/n9ldsrZy+/hnPp0/ UkYGiWrdMHZ4JYzta9DkiAiXK2uLz/iDiXosP6pMNfUvlhTsaHfDWI69xsraLaDMDShDAhm2v wKuofsyqo3WuYEaQGwHfyY5FgipFX1omMbp64Yq347e3vn5VGzEwiwVL8N9hH7Xb5GGy1mSkw nnjQRHMxsvpzJT3Hyr6KcJZBUFuxFpel0fXckl7l3zKpufs2RNjLD/pvbD9WFIJ5JtoxIGOhU iqlODydFHKdvI8EuhpgDRpKHiLabBDsLwROM8uJ38S7jC3ExtTil1Whml7FGIRyl1dWefMJGj yvMBfNSjl/EuGOaaBXPLjsa970KeWlQgXpZ56Wmmkk/bpjg0ymAq7bSdCPRCfbKZhcmhjgosJ 9yCGrrW3dDZ1MuTHCPkCwigp26dSPXKm0f9l/2HEAB7JVPt/89XhGbYrlHuviQnXqEHyl7Kw3 AjGVGATApAIOou/IOAhA== Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Signed-off-by: Lauri Kasanen --- arch/mips/Kbuild.platforms | 1 + arch/mips/Kconfig | 12 ++++++++ arch/mips/include/asm/mach-n64/irq.h | 9 ++++++ arch/mips/include/asm/n64/irq.h | 26 ++++++++++++++++ arch/mips/n64/Makefile | 6 ++++ arch/mips/n64/Platform | 7 +++++ arch/mips/n64/init.c | 59 ++++++++++++++++++++++++++++++++++++ arch/mips/n64/irq.c | 34 +++++++++++++++++++++ 8 files changed, 154 insertions(+) create mode 100644 arch/mips/include/asm/mach-n64/irq.h create mode 100644 arch/mips/include/asm/n64/irq.h create mode 100644 arch/mips/n64/Makefile create mode 100644 arch/mips/n64/Platform create mode 100644 arch/mips/n64/init.c create mode 100644 arch/mips/n64/irq.c -- 2.6.2 diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms index 5483e38..3e39590 100644 --- a/arch/mips/Kbuild.platforms +++ b/arch/mips/Kbuild.platforms @@ -18,6 +18,7 @@ platform-$(CONFIG_MACH_LOONGSON2EF) += loongson2ef/ platform-$(CONFIG_MACH_LOONGSON32) += loongson32/ platform-$(CONFIG_MACH_LOONGSON64) += loongson64/ platform-$(CONFIG_MIPS_MALTA) += mti-malta/ +platform-$(CONFIG_MIPS_N64) += n64/ platform-$(CONFIG_NLM_COMMON) += netlogic/ platform-$(CONFIG_PIC32MZDA) += pic32/ platform-$(CONFIG_MACH_PISTACHIO) += pistachio/ diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 4b52588..2922bb6 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -605,6 +605,18 @@ config MACH_VR41XX select SYS_SUPPORTS_MIPS16 select GPIOLIB +config MIPS_N64 + bool "Nintendo 64 console" + select CEVT_R4K + select CSRC_R4K + select SYS_HAS_CPU_R4300 + select SYS_SUPPORTS_BIG_ENDIAN + select SYS_SUPPORTS_ZBOOT + select SYS_SUPPORTS_32BIT_KERNEL + select SYS_SUPPORTS_64BIT_KERNEL + select DMA_NONCOHERENT + select IRQ_MIPS_CPU + config RALINK bool "Ralink based machines" select CEVT_R4K diff --git a/arch/mips/include/asm/mach-n64/irq.h b/arch/mips/include/asm/mach-n64/irq.h new file mode 100644 index 0000000..4d4a1ea --- /dev/null +++ b/arch/mips/include/asm/mach-n64/irq.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_MACH_N64_IRQ_H +#define __ASM_MACH_N64_IRQ_H + +#include /* for MIPS_CPU_IRQ_BASE */ + +#include + +#endif /* __ASM_MACH_N64_IRQ_H */ diff --git a/arch/mips/include/asm/n64/irq.h b/arch/mips/include/asm/n64/irq.h new file mode 100644 index 0000000..00f89ca --- /dev/null +++ b/arch/mips/include/asm/n64/irq.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Interrupt numbers for N64 + * + * Copyright (C) 2020 Lauri Kasanen + */ +#ifndef __N64_IRQ_H +#define __N64_IRQ_H + +#define NR_IRQS 8 + +/* + * CPU core Interrupt Numbers + */ +#define MIPS_CPU_IRQ_BASE 0 +#define MIPS_CPU_IRQ(x) (MIPS_CPU_IRQ_BASE + (x)) +#define MIPS_SOFTINT0_IRQ MIPS_CPU_IRQ(0) +#define MIPS_SOFTINT1_IRQ MIPS_CPU_IRQ(1) +#define RCP_IRQ MIPS_CPU_IRQ(2) +#define CART_IRQ MIPS_CPU_IRQ(3) +#define PRENMI_IRQ MIPS_CPU_IRQ(4) +#define RDBR_IRQ MIPS_CPU_IRQ(5) +#define RDBW_IRQ MIPS_CPU_IRQ(6) +#define TIMER_IRQ MIPS_CPU_IRQ(7) + +#endif /* __N64_IRQ_H */ diff --git a/arch/mips/n64/Makefile b/arch/mips/n64/Makefile new file mode 100644 index 0000000..b64a05a --- /dev/null +++ b/arch/mips/n64/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Nintendo 64 +# + +obj-y := init.o irq.o diff --git a/arch/mips/n64/Platform b/arch/mips/n64/Platform new file mode 100644 index 0000000..bf5edba --- /dev/null +++ b/arch/mips/n64/Platform @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Nintendo 64 +# + +cflags-$(CONFIG_MIPS_N64) += -I$(srctree)/arch/mips/include/asm/mach-n64 +load-$(CONFIG_MIPS_N64) += 0xffffffff80101000 diff --git a/arch/mips/n64/init.c b/arch/mips/n64/init.c new file mode 100644 index 0000000..6fb622d --- /dev/null +++ b/arch/mips/n64/init.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nintendo 64 init. + * + * Copyright (C) 2020 Lauri Kasanen + */ +#include +#include +#include +#include +#include + +#include +#include + +#define IO_MEM_RESOURCE_START 0UL +#define IO_MEM_RESOURCE_END 0x1fffffffUL + +static void __init iomem_resource_init(void) +{ + iomem_resource.start = IO_MEM_RESOURCE_START; + iomem_resource.end = IO_MEM_RESOURCE_END; +} + +const char *get_system_type(void) +{ + return "Nintendo 64"; +} + +void __init prom_init(void) +{ + int argc, i; + const char **argv; + + argc = fw_arg0; + argv = (const char **)fw_arg1; + + for (i = 1; i < argc; i++) { + strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE); + if (i < (argc - 1)) + strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); + } +} + +void __init prom_free_prom_memory(void) +{ +} + +void __init plat_mem_setup(void) +{ + iomem_resource_init(); + memblock_add(0x0, 8 * 1024 * 1024); // Bootloader blocks the 4mb config +} + +void __init plat_time_init(void) +{ + // 93.75 MHz cpu, count register runs at half rate + mips_hpt_frequency = 93750000 / 2; +} diff --git a/arch/mips/n64/irq.c b/arch/mips/n64/irq.c new file mode 100644 index 0000000..3eb0079 --- /dev/null +++ b/arch/mips/n64/irq.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * N64 IRQ + * + * Copyright (C) 2020 Lauri Kasanen + */ +#include +#include +#include + +#include + +asmlinkage void plat_irq_dispatch(void) +{ + unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; + + if (pending & CAUSEF_IP7) + do_IRQ(TIMER_IRQ); + else if (pending & CAUSEF_IP4) + do_IRQ(PRENMI_IRQ); + else if (pending & CAUSEF_IP2) + do_IRQ(RCP_IRQ); + else if (pending & CAUSEF_IP0) + do_IRQ(MIPS_SOFTINT0_IRQ); + else if (pending & CAUSEF_IP1) + do_IRQ(MIPS_SOFTINT1_IRQ); + else + spurious_interrupt(); +} + +void __init arch_init_irq(void) +{ + mips_cpu_irq_init(); +}