diff options
Diffstat (limited to 'drivers/mtd/maps/uclinux.c')
| -rw-r--r-- | drivers/mtd/maps/uclinux.c | 60 |
1 files changed, 37 insertions, 23 deletions
diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c index 35009294b43..c1af83db520 100644 --- a/drivers/mtd/maps/uclinux.c +++ b/drivers/mtd/maps/uclinux.c @@ -19,17 +19,30 @@ #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> #include <asm/io.h> +#include <asm/sections.h> /****************************************************************************/ -extern char _ebss; +#ifdef CONFIG_MTD_ROM +#define MAP_NAME "rom" +#else +#define MAP_NAME "ram" +#endif + +/* + * Blackfin uses uclinux_ram_map during startup, so it must not be static. + * Provide a dummy declaration to make sparse happy. + */ +extern struct map_info uclinux_ram_map; struct map_info uclinux_ram_map = { - .name = "RAM", - .phys = (unsigned long)&_ebss, + .name = MAP_NAME, .size = 0, }; +static unsigned long physaddr = -1; +module_param(physaddr, ulong, S_IRUGO); + static struct mtd_info *uclinux_ram_mtdinfo; /****************************************************************************/ @@ -61,39 +74,46 @@ static int __init uclinux_mtd_init(void) struct map_info *mapp; mapp = &uclinux_ram_map; + + if (physaddr == -1) + mapp->phys = (resource_size_t)__bss_stop; + else + mapp->phys = physaddr; + if (!mapp->size) mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8)))); mapp->bankwidth = 4; - printk("uclinux[mtd]: RAM probe address=0x%x size=0x%x\n", + printk("uclinux[mtd]: probe address=0x%x size=0x%x\n", (int) mapp->phys, (int) mapp->size); - mapp->virt = ioremap_nocache(mapp->phys, mapp->size); + /* + * The filesystem is guaranteed to be in direct mapped memory. It is + * directly following the kernels own bss region. Following the same + * mechanism used by architectures setting up traditional initrds we + * use phys_to_virt to get the virtual address of its start. + */ + mapp->virt = phys_to_virt(mapp->phys); if (mapp->virt == 0) { - printk("uclinux[mtd]: ioremap_nocache() failed\n"); + printk("uclinux[mtd]: no virtual mapping?\n"); return(-EIO); } simple_map_init(mapp); - mtd = do_map_probe("map_ram", mapp); + mtd = do_map_probe("map_" MAP_NAME, mapp); if (!mtd) { printk("uclinux[mtd]: failed to find a mapping?\n"); - iounmap(mapp->virt); return(-ENXIO); } mtd->owner = THIS_MODULE; - mtd->point = uclinux_point; + mtd->_point = uclinux_point; mtd->priv = mapp; uclinux_ram_mtdinfo = mtd; -#ifdef CONFIG_MTD_PARTITIONS - add_mtd_partitions(mtd, uclinux_romfs, NUM_PARTITIONS); -#else - add_mtd_device(mtd); -#endif + mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS); return(0); } @@ -103,18 +123,12 @@ static int __init uclinux_mtd_init(void) static void __exit uclinux_mtd_cleanup(void) { if (uclinux_ram_mtdinfo) { -#ifdef CONFIG_MTD_PARTITIONS - del_mtd_partitions(uclinux_ram_mtdinfo); -#else - del_mtd_device(uclinux_ram_mtdinfo); -#endif + mtd_device_unregister(uclinux_ram_mtdinfo); map_destroy(uclinux_ram_mtdinfo); uclinux_ram_mtdinfo = NULL; } - if (uclinux_ram_map.virt) { - iounmap((void *) uclinux_ram_map.virt); + if (uclinux_ram_map.virt) uclinux_ram_map.virt = 0; - } } /****************************************************************************/ @@ -124,6 +138,6 @@ module_exit(uclinux_mtd_cleanup); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>"); -MODULE_DESCRIPTION("Generic RAM based MTD for uClinux"); +MODULE_DESCRIPTION("Generic MTD for uClinux"); /****************************************************************************/ |