diff options
Diffstat (limited to 'cfe/cfe/arch/mips/common/src/mips_arena.c')
| -rw-r--r-- | cfe/cfe/arch/mips/common/src/mips_arena.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/cfe/cfe/arch/mips/common/src/mips_arena.c b/cfe/cfe/arch/mips/common/src/mips_arena.c new file mode 100644 index 0000000..d96fee6 --- /dev/null +++ b/cfe/cfe/arch/mips/common/src/mips_arena.c @@ -0,0 +1,186 @@ +/* ********************************************************************* + * Broadcom Common Firmware Environment (CFE) + * + * Physical Memory (arena) manager File: sb1250_arena.c + * + * This module describes the physical memory available to the + * firmware. + * + * Author: Mitch Lichtenberg (mpl@broadcom.com) + * + ********************************************************************* + * + * Copyright 2000,2001,2002,2003 + * Broadcom Corporation. All rights reserved. + * + * This software is furnished under license and may be used and + * copied only in accordance with the following terms and + * conditions. Subject to these conditions, you may download, + * copy, install, use, modify and distribute modified or unmodified + * copies of this software in source and/or binary form. No title + * or ownership is transferred hereby. + * + * 1) Any source code used, modified or distributed must reproduce + * and retain this copyright notice and list of conditions + * as they appear in the source file. + * + * 2) No right is granted to use any trade name, trademark, or + * logo of Broadcom Corporation. The "Broadcom Corporation" + * name may not be used to endorse or promote products derived + * from this software without the prior written permission of + * Broadcom Corporation. + * + * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED + * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR + * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT + * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN + * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + ********************************************************************* */ + +#include "lib_types.h" +#include "lib_string.h" +#include "lib_queue.h" +#include "lib_malloc.h" +#include "lib_printf.h" +#include "lib_arena.h" + +#include "cfe_error.h" + +#include "cfe.h" +#include "cfe_mem.h" + +#include "initdata.h" + +#define _NOPROTOS_ +#include "cfe_boot.h" +#undef _NOPROTOS_ + +#include "cpu_config.h" + +#include "addrspace.h" + +/* ********************************************************************* + * Constants + ********************************************************************* */ + + +#define MEG (1024*1024) +#define KB 1024 +#define PAGESIZE 4096 +#define CFE_BOOTAREA_SIZE (256*KB) +#define CFE_BOOTAREA_ADDR 0x20000000 + + +/* ********************************************************************* + * Globals + ********************************************************************* */ + +extern arena_t cfe_arena; +uint64_t *cfe_pagetable = NULL; + +extern void CPUCFG_PAGETBLINIT(uint64_t *ptaddr,unsigned int ptstart); + +void cfe_bootarea_init(void); +extern void _setcontext(int64_t); + + +/* ********************************************************************* + * CFE_BOOTAREA_INIT() + * + * Initialize the page table and map our boot program area. + * + * Input parameters: + * nothing + * + * Return value: + * nothing + ********************************************************************* */ + +void cfe_bootarea_init(void) +{ + unsigned char *pte; + int64_t pte_int; + unsigned int addr = 16*MEG; + unsigned int topmem; + unsigned int topcfe; + unsigned int botcfe; + unsigned int beforecfe; + unsigned int aftercfe; + + /* + * Calculate the location where the boot area will + * live. It lives either above or below the + * firmware, depending on where there's more space. + */ + + /* + * The firmware will always be loaded in the first + * 256M. Calculate the top of that region. The bottom + * of that region is always the beginning of our + * data segment. + */ + if (mem_totalsize > (uint64_t)256) { + topmem = 256*MEG; + } + else { + topmem = (unsigned int) (mem_totalsize << 20); + } + botcfe = (unsigned int) K1_TO_PHYS(mem_bottomofmem); + topcfe = (unsigned int) K1_TO_PHYS(mem_topofmem); + + beforecfe = botcfe; + aftercfe = topmem-topcfe; + + if (beforecfe > aftercfe) { + botcfe -= (PAGESIZE-1); + botcfe &= ~(PAGESIZE-1); /* round down to page boundary */ + addr = botcfe - CFE_BOOTAREA_SIZE; /* this is the address */ + } + else { + topcfe += (PAGESIZE-1); /* round *up* to a page address */ + topcfe &= ~(PAGESIZE-1); + addr = topcfe; + } + + mem_bootarea_start = addr; + mem_bootarea_size = CFE_BOOTAREA_SIZE; + + /* + * Allocate the page table + */ + + pte = KMALLOC(1024,1024); + +#ifdef __long64 + pte_int = (int64_t) pte; +#else + pte_int = (int64_t) ((int) pte); +#endif + + /* + * Set the CP0 CONTEXT register to point at the page table + */ + + pte_int <<= 13; + cfe_pagetable = (uint64_t *) pte; + + _setcontext(pte_int); + + + /* + * Initialize page table entries + */ + + CPUCFG_PAGETBLINIT(cfe_pagetable,addr); + + +} + |