diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 5 | ||||
| -rw-r--r-- | arch/mips/include/asm/rtlx.h | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/rtlx-cmp.c | 116 |
4 files changed, 123 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index ca24da8..bcd2fab 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1956,6 +1956,11 @@ config MIPS_VPE_APSP_API depends on MIPS_VPE_LOADER help +config MIPS_VPE_APSP_API_CMP + bool + default "y" + depends on MIPS_VPE_APSP_API && MIPS_CMP + config MIPS_VPE_APSP_API_MT bool default "y" diff --git a/arch/mips/include/asm/rtlx.h b/arch/mips/include/asm/rtlx.h index 6766026..fa86dfd 100644 --- a/arch/mips/include/asm/rtlx.h +++ b/arch/mips/include/asm/rtlx.h @@ -78,6 +78,7 @@ struct rtlx_channel { extern struct rtlx_info { unsigned long id; enum rtlx_state state; + int ap_int_pending; /* Status of 0 or 1 for CONFIG_MIPS_CMP only */ struct rtlx_channel channel[RTLX_CHANNELS]; } *rtlx; diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 3de44d8..26c6175 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o obj-$(CONFIG_MIPS_VPE_LOADER_CMP) += vpe-cmp.o obj-$(CONFIG_MIPS_VPE_LOADER_MT) += vpe-mt.o obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o +obj-$(CONFIG_MIPS_VPE_APSP_API_CMP) += rtlx-cmp.o obj-$(CONFIG_MIPS_VPE_APSP_API_MT) += rtlx-mt.o obj-$(CONFIG_I8259) += i8259.o diff --git a/arch/mips/kernel/rtlx-cmp.c b/arch/mips/kernel/rtlx-cmp.c new file mode 100644 index 0000000..56dc696 --- /dev/null +++ b/arch/mips/kernel/rtlx-cmp.c @@ -0,0 +1,116 @@ +/* + * 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) 2005 MIPS Technologies, Inc. All rights reserved. + * Copyright (C) 2013 Imagination Technologies Ltd. + */ +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/err.h> +#include <linux/wait.h> +#include <linux/sched.h> +#include <linux/smp.h> + +#include <asm/mips_mt.h> +#include <asm/vpe.h> +#include <asm/rtlx.h> + +static int major; + +static void rtlx_interrupt(void) +{ + int i; + struct rtlx_info *info; + struct rtlx_info **p = vpe_get_shared(aprp_cpu_index()); + + if (p == NULL || *p == NULL) + return; + + info = *p; + + if (info->ap_int_pending == 1 && smp_processor_id() == 0) { + for (i = 0; i < RTLX_CHANNELS; i++) { + wake_up(&channel_wqs[i].lx_queue); + wake_up(&channel_wqs[i].rt_queue); + } + info->ap_int_pending = 0; + } +} + +void _interrupt_sp(void) +{ + smp_send_reschedule(aprp_cpu_index()); +} + +int __init rtlx_module_init(void) +{ + struct device *dev; + int i, err; + + if (!cpu_has_mipsmt) { + pr_warn("VPE loader: not a MIPS MT capable processor\n"); + return -ENODEV; + } + + if (num_possible_cpus() - aprp_cpu_index() < 1) { + pr_warn("No TCs reserved for AP/SP, not initializing RTLX.\n" + "Pass maxcpus=<n> argument as kernel argument\n"); + + return -ENODEV; + } + + major = register_chrdev(0, RTLX_MODULE_NAME, &rtlx_fops); + if (major < 0) { + pr_err("rtlx_module_init: unable to register device\n"); + return major; + } + + /* initialise the wait queues */ + for (i = 0; i < RTLX_CHANNELS; i++) { + init_waitqueue_head(&channel_wqs[i].rt_queue); + init_waitqueue_head(&channel_wqs[i].lx_queue); + atomic_set(&channel_wqs[i].in_open, 0); + mutex_init(&channel_wqs[i].mutex); + + dev = device_create(mt_class, NULL, MKDEV(major, i), NULL, + "%s%d", RTLX_MODULE_NAME, i); + if (IS_ERR(dev)) { + err = PTR_ERR(dev); + goto out_chrdev; + } + } + + /* set up notifiers */ + rtlx_notify.start = rtlx_starting; + rtlx_notify.stop = rtlx_stopping; + vpe_notify(aprp_cpu_index(), &rtlx_notify); + + if (cpu_has_vint) { + aprp_hook = rtlx_interrupt; + } else { + pr_err("APRP RTLX init on non-vectored-interrupt processor\n"); + err = -ENODEV; + goto out_class; + } + + return 0; + +out_class: + for (i = 0; i < RTLX_CHANNELS; i++) + device_destroy(mt_class, MKDEV(major, i)); +out_chrdev: + unregister_chrdev(major, RTLX_MODULE_NAME); + + return err; +} + +void __exit rtlx_module_exit(void) +{ + int i; + + for (i = 0; i < RTLX_CHANNELS; i++) + device_destroy(mt_class, MKDEV(major, i)); + unregister_chrdev(major, RTLX_MODULE_NAME); +} |