X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fpnp%2Fpnpbios%2Fbioscalls.c;h=7ff824496b397b236eda67c1a39b178b6ea22024;hb=908cf4b925e419bc74f3297b2f0e51d6f8a81da2;hp=a1f0b0ba2bfe8600109b0061a93d4ea47b26e6a4;hpb=9fdb62af92c741addbea15545f214a6e89460865;p=linux-2.6 diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c index a1f0b0ba2b..7ff824496b 100644 --- a/drivers/pnp/pnpbios/bioscalls.c +++ b/drivers/pnp/pnpbios/bioscalls.c @@ -1,6 +1,5 @@ /* * bioscalls.c - the lowlevel layer of the PnPBIOS driver - * */ #include @@ -8,7 +7,6 @@ #include #include #include -#include #include #include #include @@ -26,11 +24,10 @@ #include "pnpbios.h" static struct { - u16 offset; - u16 segment; + u16 offset; + u16 segment; } pnp_bios_callpoint; - /* * These are some opcodes for a "static asmlinkage" * As this code is *not* executed inside the linux kernel segment, but in a @@ -44,8 +41,7 @@ static struct { asmlinkage void pnp_bios_callfunc(void); -__asm__( - ".text \n" +__asm__(".text \n" __ALIGN_STR "\n" "pnp_bios_callfunc:\n" " pushl %edx \n" @@ -55,8 +51,7 @@ __asm__( " lcallw *pnp_bios_callpoint\n" " addl $16, %esp \n" " lret \n" - ".previous \n" -); + ".previous \n"); #define Q2_SET_SEL(cpu, selname, address, size) \ do { \ @@ -65,7 +60,7 @@ set_base(gdt[(selname) >> 3], (u32)(address)); \ set_limit(gdt[(selname) >> 3], size); \ } while(0) -static struct desc_struct bad_bios_desc = { 0, 0x00409200 }; +static struct desc_struct bad_bios_desc; /* * At some point we want to use this stack frame pointer to unwind @@ -78,7 +73,6 @@ u32 pnp_bios_is_utter_crap = 0; static spinlock_t pnp_bios_lock; - /* * Support Functions */ @@ -97,7 +91,7 @@ static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3, * PnP BIOSes are generally not terribly re-entrant. * Also, don't rely on them to save everything correctly. */ - if(pnp_bios_is_utter_crap) + if (pnp_bios_is_utter_crap) return PNP_FUNCTION_NOT_SUPPORTED; cpu = get_cpu(); @@ -113,112 +107,128 @@ static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3, if (ts2_size) Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size); - __asm__ __volatile__( - "pushl %%ebp\n\t" - "pushl %%edi\n\t" - "pushl %%esi\n\t" - "pushl %%ds\n\t" - "pushl %%es\n\t" - "pushl %%fs\n\t" - "pushl %%gs\n\t" - "pushfl\n\t" - "movl %%esp, pnp_bios_fault_esp\n\t" - "movl $1f, pnp_bios_fault_eip\n\t" - "lcall %5,%6\n\t" - "1:popfl\n\t" - "popl %%gs\n\t" - "popl %%fs\n\t" - "popl %%es\n\t" - "popl %%ds\n\t" - "popl %%esi\n\t" - "popl %%edi\n\t" - "popl %%ebp\n\t" - : "=a" (status) - : "0" ((func) | (((u32)arg1) << 16)), - "b" ((arg2) | (((u32)arg3) << 16)), - "c" ((arg4) | (((u32)arg5) << 16)), - "d" ((arg6) | (((u32)arg7) << 16)), - "i" (PNP_CS32), - "i" (0) - : "memory" - ); + __asm__ __volatile__("pushl %%ebp\n\t" + "pushl %%edi\n\t" + "pushl %%esi\n\t" + "pushl %%ds\n\t" + "pushl %%es\n\t" + "pushl %%fs\n\t" + "pushl %%gs\n\t" + "pushfl\n\t" + "movl %%esp, pnp_bios_fault_esp\n\t" + "movl $1f, pnp_bios_fault_eip\n\t" + "lcall %5,%6\n\t" + "1:popfl\n\t" + "popl %%gs\n\t" + "popl %%fs\n\t" + "popl %%es\n\t" + "popl %%ds\n\t" + "popl %%esi\n\t" + "popl %%edi\n\t" + "popl %%ebp\n\t":"=a"(status) + :"0"((func) | (((u32) arg1) << 16)), + "b"((arg2) | (((u32) arg3) << 16)), + "c"((arg4) | (((u32) arg5) << 16)), + "d"((arg6) | (((u32) arg7) << 16)), + "i"(PNP_CS32), "i"(0) + :"memory"); spin_unlock_irqrestore(&pnp_bios_lock, flags); get_cpu_gdt_table(cpu)[0x40 / 8] = save_desc_40; put_cpu(); /* If we get here and this is set then the PnP BIOS faulted on us. */ - if(pnp_bios_is_utter_crap) - { - printk(KERN_ERR "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n"); - printk(KERN_ERR "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n"); - printk(KERN_ERR "PnPBIOS: Check with your vendor for an updated BIOS\n"); + if (pnp_bios_is_utter_crap) { + printk(KERN_ERR + "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n"); + printk(KERN_ERR + "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n"); + printk(KERN_ERR + "PnPBIOS: Check with your vendor for an updated BIOS\n"); } return status; } -void pnpbios_print_status(const char * module, u16 status) +void pnpbios_print_status(const char *module, u16 status) { - switch(status) { + switch (status) { case PNP_SUCCESS: printk(KERN_ERR "PnPBIOS: %s: function successful\n", module); break; case PNP_NOT_SET_STATICALLY: - printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", module); + printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", + module); break; case PNP_UNKNOWN_FUNCTION: - printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", module); + printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", + module); break; case PNP_FUNCTION_NOT_SUPPORTED: - printk(KERN_ERR "PnPBIOS: %s: function not supported on this system\n", module); + printk(KERN_ERR + "PnPBIOS: %s: function not supported on this system\n", + module); break; case PNP_INVALID_HANDLE: printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module); break; case PNP_BAD_PARAMETER: - printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", module); + printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", + module); break; case PNP_SET_FAILED: - printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", module); + printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", + module); break; case PNP_EVENTS_NOT_PENDING: printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module); break; case PNP_SYSTEM_NOT_DOCKED: - printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", module); + printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", + module); break; case PNP_NO_ISA_PNP_CARDS: - printk(KERN_ERR "PnPBIOS: %s: no isapnp cards are installed on this system\n", module); + printk(KERN_ERR + "PnPBIOS: %s: no isapnp cards are installed on this system\n", + module); break; case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES: - printk(KERN_ERR "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", module); + printk(KERN_ERR + "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", + module); break; case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY: - printk(KERN_ERR "PnPBIOS: %s: unable to undock, the system does not have a battery\n", module); + printk(KERN_ERR + "PnPBIOS: %s: unable to undock, the system does not have a battery\n", + module); break; case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT: - printk(KERN_ERR "PnPBIOS: %s: could not dock due to resource conflicts\n", module); + printk(KERN_ERR + "PnPBIOS: %s: could not dock due to resource conflicts\n", + module); break; case PNP_BUFFER_TOO_SMALL: - printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", module); + printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", + module); break; case PNP_USE_ESCD_SUPPORT: printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module); break; case PNP_MESSAGE_NOT_SUPPORTED: - printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", module); + printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", + module); break; case PNP_HARDWARE_ERROR: - printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n", module); + printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n", + module); break; default: - printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, status); + printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, + status); break; } } - /* * PnP BIOS Low Level Calls */ @@ -243,19 +253,22 @@ void pnpbios_print_status(const char * module, u16 status) static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data) { u16 status; + if (!pnp_bios_present()) return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, PNP_TS1, PNP_DS, 0, 0, - data, sizeof(struct pnp_dev_node_info), NULL, 0); + status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, + PNP_TS1, PNP_DS, 0, 0, data, + sizeof(struct pnp_dev_node_info), NULL, 0); data->no_nodes &= 0xff; return status; } int pnp_bios_dev_node_info(struct pnp_dev_node_info *data) { - int status = __pnp_bios_dev_node_info( data ); - if ( status ) - pnpbios_print_status( "dev_node_info", status ); + int status = __pnp_bios_dev_node_info(data); + + if (status) + pnpbios_print_status("dev_node_info", status); return status; } @@ -273,17 +286,20 @@ int pnp_bios_dev_node_info(struct pnp_dev_node_info *data) * or volatile current (0) config * Output: *nodenum=next node or 0xff if no more nodes */ -static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data) +static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, + struct pnp_bios_node *data) { u16 status; u16 tmp_nodenum; + if (!pnp_bios_present()) return PNP_FUNCTION_NOT_SUPPORTED; - if ( !boot && pnpbios_dont_use_current_config ) + if (!boot && pnpbios_dont_use_current_config) return PNP_FUNCTION_NOT_SUPPORTED; tmp_nodenum = *nodenum; - status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, boot ? 2 : 1, PNP_DS, 0, - &tmp_nodenum, sizeof(tmp_nodenum), data, 65536); + status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, + boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum, + sizeof(tmp_nodenum), data, 65536); *nodenum = tmp_nodenum; return status; } @@ -291,104 +307,66 @@ static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data) { int status; - status = __pnp_bios_get_dev_node( nodenum, boot, data ); - if ( status ) - pnpbios_print_status( "get_dev_node", status ); + + status = __pnp_bios_get_dev_node(nodenum, boot, data); + if (status) + pnpbios_print_status("get_dev_node", status); return status; } - /* * Call PnP BIOS with function 0x02, "set system device node" * Input: *nodenum = desired node, * boot = whether to set nonvolatile boot (!=0) * or volatile current (0) config */ -static int __pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data) +static int __pnp_bios_set_dev_node(u8 nodenum, char boot, + struct pnp_bios_node *data) { u16 status; + if (!pnp_bios_present()) return PNP_FUNCTION_NOT_SUPPORTED; - if ( !boot && pnpbios_dont_use_current_config ) + if (!boot && pnpbios_dont_use_current_config) return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, boot ? 2 : 1, PNP_DS, 0, 0, - data, 65536, NULL, 0); + status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, + boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL, + 0); return status; } int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data) { int status; - status = __pnp_bios_set_dev_node( nodenum, boot, data ); - if ( status ) { - pnpbios_print_status( "set_dev_node", status ); + + status = __pnp_bios_set_dev_node(nodenum, boot, data); + if (status) { + pnpbios_print_status("set_dev_node", status); return status; } - if ( !boot ) { /* Update devlist */ - status = pnp_bios_get_dev_node( &nodenum, boot, data ); - if ( status ) + if (!boot) { /* Update devlist */ + status = pnp_bios_get_dev_node(&nodenum, boot, data); + if (status) return status; } return status; } -#if needed -/* - * Call PnP BIOS with function 0x03, "get event" - */ -static int pnp_bios_get_event(u16 *event) -{ - u16 status; - if (!pnp_bios_present()) - return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_EVENT, 0, PNP_TS1, PNP_DS, 0, 0 ,0 ,0, - event, sizeof(u16), NULL, 0); - return status; -} -#endif - -#if needed -/* - * Call PnP BIOS with function 0x04, "send message" - */ -static int pnp_bios_send_message(u16 message) -{ - u16 status; - if (!pnp_bios_present()) - return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_SEND_MESSAGE, message, PNP_DS, 0, 0, 0, 0, 0, 0, 0, 0, 0); - return status; -} -#endif - /* * Call PnP BIOS with function 0x05, "get docking station information" */ int pnp_bios_dock_station_info(struct pnp_docking_station_info *data) { u16 status; - if (!pnp_bios_present()) - return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0, - data, sizeof(struct pnp_docking_station_info), NULL, 0); - return status; -} -#if needed -/* - * Call PnP BIOS with function 0x09, "set statically allocated resource - * information" - */ -static int pnp_bios_set_stat_res(char *info) -{ - u16 status; if (!pnp_bios_present()) return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_SET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0, - info, *((u16 *) info), 0, 0); + status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, + PNP_DS, 0, 0, 0, 0, data, + sizeof(struct pnp_docking_station_info), NULL, + 0); return status; } -#endif /* * Call PnP BIOS with function 0x0a, "get statically allocated resource @@ -397,36 +375,23 @@ static int pnp_bios_set_stat_res(char *info) static int __pnp_bios_get_stat_res(char *info) { u16 status; + if (!pnp_bios_present()) return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0, - info, 65536, NULL, 0); + status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, + PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0); return status; } int pnp_bios_get_stat_res(char *info) { int status; - status = __pnp_bios_get_stat_res( info ); - if ( status ) - pnpbios_print_status( "get_stat_res", status ); - return status; -} -#if needed -/* - * Call PnP BIOS with function 0x0b, "get APM id table" - */ -static int pnp_bios_apm_id_table(char *table, u16 *size) -{ - u16 status; - if (!pnp_bios_present()) - return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_APM_ID_TABLE, 0, PNP_TS2, 0, PNP_TS1, PNP_DS, 0, 0, - table, *size, size, sizeof(u16)); + status = __pnp_bios_get_stat_res(info); + if (status) + pnpbios_print_status("get_stat_res", status); return status; } -#endif /* * Call PnP BIOS with function 0x40, "get isa pnp configuration structure" @@ -434,19 +399,22 @@ static int pnp_bios_apm_id_table(char *table, u16 *size) static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) { u16 status; + if (!pnp_bios_present()) return PNP_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0, - data, sizeof(struct pnp_isa_config_struc), NULL, 0); + status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, + 0, 0, 0, 0, data, + sizeof(struct pnp_isa_config_struc), NULL, 0); return status; } int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) { int status; - status = __pnp_bios_isapnp_config( data ); - if ( status ) - pnpbios_print_status( "isapnp_config", status ); + + status = __pnp_bios_isapnp_config(data); + if (status) + pnpbios_print_status("isapnp_config", status); return status; } @@ -456,19 +424,22 @@ int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) static int __pnp_bios_escd_info(struct escd_info_struc *data) { u16 status; + if (!pnp_bios_present()) return ESCD_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, PNP_TS1, PNP_DS, - data, sizeof(struct escd_info_struc), NULL, 0); + status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, + PNP_TS1, PNP_DS, data, + sizeof(struct escd_info_struc), NULL, 0); return status; } int pnp_bios_escd_info(struct escd_info_struc *data) { int status; - status = __pnp_bios_escd_info( data ); - if ( status ) - pnpbios_print_status( "escd_info", status ); + + status = __pnp_bios_escd_info(data); + if (status) + pnpbios_print_status("escd_info", status); return status; } @@ -479,57 +450,45 @@ int pnp_bios_escd_info(struct escd_info_struc *data) static int __pnp_bios_read_escd(char *data, u32 nvram_base) { u16 status; + if (!pnp_bios_present()) return ESCD_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0, - data, 65536, __va(nvram_base), 65536); + status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, + 0, data, 65536, __va(nvram_base), 65536); return status; } int pnp_bios_read_escd(char *data, u32 nvram_base) { int status; - status = __pnp_bios_read_escd( data, nvram_base ); - if ( status ) - pnpbios_print_status( "read_escd", status ); - return status; -} -#if needed -/* - * Call PnP BIOS function 0x43, "write ESCD" - */ -static int pnp_bios_write_escd(char *data, u32 nvram_base) -{ - u16 status; - if (!pnp_bios_present()) - return ESCD_FUNCTION_NOT_SUPPORTED; - status = call_pnp_bios(PNP_WRITE_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0, - data, 65536, __va(nvram_base), 65536); + status = __pnp_bios_read_escd(data, nvram_base); + if (status) + pnpbios_print_status("read_escd", status); return status; } -#endif - - -/* - * Initialization - */ void pnpbios_calls_init(union pnp_bios_install_struct *header) { int i; + spin_lock_init(&pnp_bios_lock); pnp_bios_callpoint.offset = header->fields.pm16offset; pnp_bios_callpoint.segment = PNP_CS16; + bad_bios_desc.a = 0; + bad_bios_desc.b = 0x00409200; + set_base(bad_bios_desc, __va((unsigned long)0x40 << 4)); _set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4)); - for (i = 0; i < NR_CPUS; i++) { - struct desc_struct *gdt = get_cpu_gdt_table(i); - if (!gdt) - continue; - set_base(gdt[GDT_ENTRY_PNPBIOS_CS32], &pnp_bios_callfunc); - set_base(gdt[GDT_ENTRY_PNPBIOS_CS16], __va(header->fields.pm16cseg)); - set_base(gdt[GDT_ENTRY_PNPBIOS_DS], __va(header->fields.pm16dseg)); - } + for (i = 0; i < NR_CPUS; i++) { + struct desc_struct *gdt = get_cpu_gdt_table(i); + if (!gdt) + continue; + set_base(gdt[GDT_ENTRY_PNPBIOS_CS32], &pnp_bios_callfunc); + set_base(gdt[GDT_ENTRY_PNPBIOS_CS16], + __va(header->fields.pm16cseg)); + set_base(gdt[GDT_ENTRY_PNPBIOS_DS], + __va(header->fields.pm16dseg)); + } }