diff options
Diffstat (limited to 'arch/mips/kernel/vpe.c')
| -rw-r--r-- | arch/mips/kernel/vpe.c | 67 |
1 files changed, 43 insertions, 24 deletions
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c index 458fccf87c54..c9ee9d2d5856 100644 --- a/arch/mips/kernel/vpe.c +++ b/arch/mips/kernel/vpe.c @@ -29,6 +29,7 @@ */ #include <linux/kernel.h> +#include <linux/device.h> #include <linux/module.h> #include <linux/fs.h> #include <linux/init.h> @@ -48,6 +49,7 @@ #include <asm/cacheflush.h> #include <asm/atomic.h> #include <asm/cpu.h> +#include <asm/mips_mt.h> #include <asm/processor.h> #include <asm/system.h> #include <asm/vpe.h> @@ -64,6 +66,7 @@ typedef void *vpe_handle; static char module_name[] = "vpe"; static int major; +static const int minor = 1; /* fixed for now */ #ifdef CONFIG_MIPS_APSP_KSPD static struct kspd_notifications kspd_events; @@ -522,7 +525,7 @@ static int (*reloc_handlers[]) (struct module *me, uint32_t *location, }; static char *rstrs[] = { - [R_MIPS_NONE] = "MIPS_NONE", + [R_MIPS_NONE] = "MIPS_NONE", [R_MIPS_32] = "MIPS_32", [R_MIPS_26] = "MIPS_26", [R_MIPS_HI16] = "MIPS_HI16", @@ -695,7 +698,7 @@ static void dump_tclist(void) } /* We are prepared so configure and start the VPE... */ -int vpe_run(struct vpe * v) +static int vpe_run(struct vpe * v) { struct vpe_notifications *n; unsigned long val, dmt_flag; @@ -713,16 +716,16 @@ int vpe_run(struct vpe * v) dvpe(); if (!list_empty(&v->tc)) { - if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { - printk(KERN_WARNING "VPE loader: TC %d is already in use.\n", - t->index); - return -ENOEXEC; - } - } else { - printk(KERN_WARNING "VPE loader: No TC's associated with VPE %d\n", - v->minor); - return -ENOEXEC; - } + if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { + printk(KERN_WARNING "VPE loader: TC %d is already in use.\n", + t->index); + return -ENOEXEC; + } + } else { + printk(KERN_WARNING "VPE loader: No TC's associated with VPE %d\n", + v->minor); + return -ENOEXEC; + } /* Put MVPE's into 'configuration state' */ set_c0_mvpcontrol(MVPCONTROL_VPC); @@ -775,14 +778,14 @@ int vpe_run(struct vpe * v) back_to_back_c0_hazard(); - /* Set up the XTC bit in vpeconf0 to point at our tc */ - write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) - | (t->index << VPECONF0_XTC_SHIFT)); + /* Set up the XTC bit in vpeconf0 to point at our tc */ + write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) + | (t->index << VPECONF0_XTC_SHIFT)); back_to_back_c0_hazard(); - /* enable this VPE */ - write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); + /* enable this VPE */ + write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); /* clear out any left overs from a previous program */ write_vpe_c0_status(0); @@ -832,7 +835,7 @@ static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, * contents of the program (p)buffer performing relocatations/etc, free's it * when finished. */ -int vpe_elfload(struct vpe * v) +static int vpe_elfload(struct vpe * v) { Elf_Ehdr *hdr; Elf_Shdr *sechdrs; @@ -1076,6 +1079,7 @@ static int getcwd(char *buff, int size) static int vpe_open(struct inode *inode, struct file *filp) { int minor, ret; + enum vpe_state state; struct vpe *v; struct vpe_notifications *not; @@ -1090,7 +1094,8 @@ static int vpe_open(struct inode *inode, struct file *filp) return -ENODEV; } - if (v->state != VPE_STATE_UNUSED) { + state = xchg(&v->state, VPE_STATE_INUSE); + if (state != VPE_STATE_UNUSED) { dvpe(); printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); @@ -1105,9 +1110,6 @@ static int vpe_open(struct inode *inode, struct file *filp) cleanup_tc(get_tc(minor)); } - // allocate it so when we get write ops we know it's expected. - v->state = VPE_STATE_INUSE; - /* this of-course trashes what was there before... */ v->pbuffer = vmalloc(P_SIZE); v->plen = P_SIZE; @@ -1205,7 +1207,7 @@ static ssize_t vpe_write(struct file *file, const char __user * buffer, return ret; } -static struct file_operations vpe_fops = { +static const struct file_operations vpe_fops = { .owner = THIS_MODULE, .open = vpe_open, .release = vpe_release, @@ -1365,12 +1367,15 @@ static void kspd_sp_exit( int sp_id) } #endif +static struct device *vpe_dev; + static int __init vpe_module_init(void) { struct vpe *v = NULL; + struct device *dev; struct tc *t; unsigned long val; - int i; + int i, err; if (!cpu_has_mipsmt) { printk("VPE loader: not a MIPS MT capable processor\n"); @@ -1383,6 +1388,14 @@ static int __init vpe_module_init(void) return major; } + dev = device_create(mt_class, NULL, MKDEV(major, minor), + "tc%d", minor); + if (IS_ERR(dev)) { + err = PTR_ERR(dev); + goto out_chrdev; + } + vpe_dev = dev; + dmt(); dvpe(); @@ -1478,6 +1491,11 @@ static int __init vpe_module_init(void) kspd_events.kspd_sp_exit = kspd_sp_exit; #endif return 0; + +out_chrdev: + unregister_chrdev(major, module_name); + + return err; } static void __exit vpe_module_exit(void) @@ -1490,6 +1508,7 @@ static void __exit vpe_module_exit(void) } } + device_destroy(mt_class, MKDEV(major, minor)); unregister_chrdev(major, module_name); } |