diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/kernel/thread.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/kernel/thread.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/kernel/thread.c b/target/linux/ubicom32/files/arch/ubicom32/kernel/thread.c deleted file mode 100644 index aaa5fbea4e..0000000000 --- a/target/linux/ubicom32/files/arch/ubicom32/kernel/thread.c +++ /dev/null @@ -1,228 +0,0 @@ -/* - * arch/ubicom32/kernel/thread.c - * Ubicom32 architecture hardware thread support. - * - * (C) Copyright 2009, Ubicom, Inc. - * - * This file is part of the Ubicom32 Linux Kernel Port. - * - * The Ubicom32 Linux Kernel Port 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. - * - * The Ubicom32 Linux Kernel Port is distributed in the hope that 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 the Ubicom32 Linux Kernel Port. If not, - * see <http://www.gnu.org/licenses/>. - * - * Ubicom32 implementation derived from (with many thanks): - * arch/m68knommu - * arch/blackfin - * arch/parisc - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/profile.h> -#include <linux/clocksource.h> -#include <linux/types.h> -#include <asm/ip5000.h> -#include <asm/machdep.h> -#include <asm/asm-offsets.h> -#include <asm/thread.h> - -/* - * TODO: At some point change the name here to be thread_ksp - */ -unsigned int sw_ksp[THREAD_ARCHITECTURAL_MAX]; - -static unsigned int thread_mask = -1; -static unsigned int thread_mainline_mask; - -/* - * thread_entry() - * Returning from the called function will disable the thread. - * - * This could be a naked call to allow for hwthreads that do not have stacks. - * However, with -O0, the code still writes to thex stack, and this was - * corrupting memory just after the callers stack. - */ -static void thread_entry(void *arg, thread_exec_fn_t exec) -{ - /* - * Call thread function - */ - exec(arg); - - /* - * Complete => Disable self - */ - thread_disable(thread_get_self()); -} - -/* - * thread_start() - * Start the specified function on the specified hardware thread. - */ -thread_t thread_start(thread_t thread, - thread_exec_fn_t exec, - void *arg, - unsigned int *sp_high, - thread_type_t type) -{ - /* - * Sanity check - */ - unsigned int enabled, mask, csr; - asm volatile ( - "move.4 %0, MT_EN\n\t" - : "=m" (enabled) - ); - - mask = 1 << thread; - if (enabled & mask) { - printk(KERN_WARNING "request to enable a previously enabled thread\n"); - return (thread_t)-1; - } - - /* - * Update thread state - */ - csr = (thread << 15) | (1 << 14); - asm volatile ( - "setcsr %0 \n\t" - "setcsr_flush 0 \n\t" - - "move.4 A0, #0 \n\t" - "move.4 A1, #0 \n\t" - "move.4 A2, #0 \n\t" - "move.4 A3, #0 \n\t" - "move.4 A4, #0 \n\t" - "move.4 A5, #0 \n\t" - "move.4 A6, #0 \n\t" - "move.4 SP, %4 \n\t" /* A7 is SP */ - - "move.4 D0, %3 \n\t" - "move.4 D1, %2 \n\t" - "move.4 D2, #0 \n\t" - "move.4 D3, #0 \n\t" - "move.4 D4, #0 \n\t" - "move.4 D5, #0 \n\t" - "move.4 D6, #0 \n\t" - "move.4 D7, #0 \n\t" - "move.4 D8, #0 \n\t" - "move.4 D9, #0 \n\t" - "move.4 D10, #0 \n\t" - "move.4 D11, #0 \n\t" - "move.4 D12, #0 \n\t" - "move.4 D13, #0 \n\t" - "move.4 D14, #0 \n\t" - "move.4 D15, #0 \n\t" - - "move.4 INT_MASK0, #0 \n\t" - "move.4 INT_MASK1, #0 \n\t" - "move.4 PC, %1 \n\t" - "setcsr #0 \n\t" - "setcsr_flush 0 \n\t" - : - : "r" (csr), "r" (thread_entry), "r" (exec), - "r" (arg), "r" (sp_high) - ); - - /* - * Apply HRT state - */ - if (type & THREAD_TYPE_HRT) { - asm volatile ( - "or.4 MT_HRT, MT_HRT, %0\n\t" - : - : "d" (mask) - : "cc" - ); - } else { - asm volatile ( - "and.4 MT_HRT, MT_HRT, %0\n\t" - : - : "d" (~mask) - : "cc" - ); - } - - /* - * Set priority - */ - asm volatile ( - "or.4 MT_HPRI, MT_HPRI, %0\n\t" - : - : "d" (mask) - : "cc" - ); - - /* - * Enable thread - */ - asm volatile ( - "move.4 MT_ACTIVE_SET, %0 \n\t" - : - : "d" (mask) - ); - thread_enable_mask(mask); - return thread; -} - -/* - * thread_get_mainline() - * Return a mask of those threads that are Linux mainline threads. - */ -unsigned int thread_get_mainline(void) -{ - return thread_mainline_mask; -} - -/* - * thread_set_mainline() - * Indicate that the specified thread is a Linux mainline thread. - */ -void thread_set_mainline(thread_t tid) -{ - thread_mainline_mask |= (1 << tid); -} - -/* - * thread_alloc() - * Allocate an unused hardware thread. - */ -thread_t thread_alloc(void) -{ - thread_t tid; - - /* - * If this is the first time we are here get the list of unused - * threads from the processor device tree node. - */ - if (thread_mask == -1) { - thread_mask = processor_threads(); - } - - if (!thread_mask) { - return (thread_t)-1; - } - - tid = ffs(thread_mask); - if (tid != 0) { - tid--; - thread_mask &= ~(1 << tid); - return tid; - } - - return (thread_t)-1; -} |