pdc.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:6k
- /* arch/parisc/kernel/pdc.c - safe pdc access routines
- *
- * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
- * portions Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
- *
- * only these routines should be used out of the real kernel (i.e. everything
- * using virtual addresses) for obvious reasons */
- /* I think it would be in everyone's best interest to follow this
- * guidelines when writing PDC wrappers:
- *
- * - the name of the pdc wrapper should match one of the macros
- * used for the first two arguments
- * - don't use caps for random parts of the name
- * - use ASSERT_ALIGN to ensure the aligment of the arguments is
- * correct
- * - use __pa() to convert virtual (kernel) pointers to physical
- * ones.
- * - the name of the struct used for pdc return values should equal
- * one of the macros used for the first two arguments to the
- * corresponding PDC call
- * - keep the order of arguments
- * - don't be smart (setting trailing NUL bytes for strings, return
- * something useful even if the call failed) unless you are sure
- * it's not going to affect functionality or performance
- *
- * Example:
- * int pdc_cache_info(struct pdc_cache_info *cache_info )
- * {
- * ASSERT_ALIGN(cache_info, 8);
- *
- * return mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
- * }
- * prumpf 991016
- */
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <asm/page.h>
- #include <asm/pdc.h>
- #include <asm/real.h>
- #include <asm/system.h>
- #define ASSERT_ALIGN(ptr, align)
- do { if(((unsigned long)(ptr)) & (align-1)) {
- printk("PDC: %s:%d %s() called with "
- "unaligned argument from %p", __FILE__, __LINE__,
- __FUNCTION__, __builtin_return_address(0));
-
- return -1;
- } } while(0)
-
- /* verify address can be accessed without an HPMC */
- int pdc_add_valid(void *address)
- {
- ASSERT_ALIGN(address, 4);
- return mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, (unsigned long)address);
- }
- #if 0
- int pdc_chassis_warn(struct pdc_chassis_warn *address)
- {
- ASSERT_ALIGN(address, 4);
- return mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(address), 0);
- }
- #endif
- int pdc_chassis_disp(unsigned long disp)
- {
- return mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
- }
- int pdc_chassis_info(void *pdc_result, void *chassis_info, unsigned long len)
- {
- ASSERT_ALIGN(pdc_result, 4);
- ASSERT_ALIGN(chassis_info, 4);
- return mem_pdc_call(PDC_CHASSIS,PDC_RETURN_CHASSIS_INFO,
- __pa(pdc_result), __pa(chassis_info), len);
- }
- int pdc_hpa_processor(void *address)
- {
- /* We're using 0 for the last parameter just to make sure.
- It's actually HVERSION dependant. And remember, life is
- hard without a backspace. */
- ASSERT_ALIGN(address, 4);
- return mem_pdc_call(PDC_HPA, PDC_HPA_PROCESSOR, __pa(address),0);
- }
- #if 0
- int pdc_hpa_modules(void *address)
- {
- return mem_pdc_call(PDC_HPA, PDC_HPA_MODULES, address);
- }
- #endif
- int pdc_iodc_read(void *address, void * hpa, unsigned int index,
- void * iodc_data, unsigned int iodc_data_size)
- {
- ASSERT_ALIGN(address, 4);
- ASSERT_ALIGN(iodc_data, 8);
- return mem_pdc_call(PDC_IODC, PDC_IODC_READ,
- __pa(address), hpa, index, __pa(iodc_data), iodc_data_size);
- }
- int pdc_system_map_find_mods(void *pdc_mod_info,
- void *mod_path, int index)
- {
- return mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE,
- __pa(pdc_mod_info), __pa(mod_path), (long)index);
- }
- int pdc_model_info(struct pdc_model *model) {
- ASSERT_ALIGN(model, 8);
- return mem_pdc_call(PDC_MODEL,PDC_MODEL_INFO,__pa(model),0);
- }
- /* get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L) */
- int pdc_model_sysmodel(char * name)
- {
- struct pdc_model_sysmodel sys_model;
- int retval;
-
- ASSERT_ALIGN(&sys_model, 8);
- ASSERT_ALIGN(name, 4);
- sys_model.mod_len = 0;
- retval = mem_pdc_call(PDC_MODEL,PDC_MODEL_SYSMODEL,__pa(&sys_model),
- OS_ID_HPUX,__pa(name));
-
- if (retval == PDC_RET_OK)
- name[sys_model.mod_len] = ' '; /* add trailing ' ' */
- else
- name[0] = 0;
-
- return retval;
- }
- /* id: 0 = cpu revision, 1 = boot-rom-version */
- int pdc_model_versions(struct pdc_model_cpuid *cpu_id, int id) {
- return mem_pdc_call(PDC_MODEL,PDC_MODEL_VERSIONS,__pa(cpu_id),id);
- }
- int pdc_model_cpuid(struct pdc_model_cpuid *cpu_id) {
- cpu_id->cpuid = 0; /* preset zero (call maybe not implemented!) */
- return mem_pdc_call(PDC_MODEL,6,__pa(cpu_id),0); /* 6="return CPU ID" */
- }
- int pdc_cache_info(struct pdc_cache_info *cache_info) {
- ASSERT_ALIGN(cache_info, 8);
- return mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
- }
- #ifndef __LP64__
- int pdc_btlb_info( struct pdc_btlb_info *btlb ) {
- int status;
- status = mem_pdc_call(PDC_BLOCK_TLB,PDC_BTLB_INFO,__pa(btlb),0);
- if (status<0) btlb->max_size = 0;
- return status;
- }
- int pdc_mem_map_hpa(void *r_addr, void *mod_path) {
- return mem_pdc_call(PDC_MEM_MAP,PDC_MEM_MAP_HPA,
- __pa(r_addr),__pa(mod_path));
- }
- int pdc_lan_station_id(char *lan_addr, void *net_hpa) {
- struct pdc_lan_station_id id;
- unsigned char *addr;
-
- if (mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
- __pa(&id), net_hpa) < 0)
- addr = 0; /* FIXME: else read MAC from NVRAM */
- else
- addr = id.addr;
- if (addr)
- memmove( lan_addr, addr, PDC_LAN_STATION_ID_SIZE);
- else
- memset( lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
- return (addr != 0);
- }
- #endif
- /* Similar to PDC_PAT stuff in pdcpat.c - but added for Forte/Allegro boxes */
- int pdc_pci_irt_size(void *r_addr, void *hpa)
- {
- return mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
- __pa(r_addr), hpa);
- }
- int pdc_pci_irt(void *r_addr, void *hpa, void *tbl)
- {
- return mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
- __pa(r_addr), hpa, __pa(tbl));
- }
- /* access the TOD clock */
- int pdc_tod_read(struct pdc_tod *tod)
- {
- ASSERT_ALIGN(tod, 8);
- return mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(tod), 0);
- }
- int pdc_tod_set(unsigned long sec, unsigned long usec)
- {
- return mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
- }