diff options
Diffstat (limited to 'src/cpu/amd/model_lx')
| -rw-r--r-- | src/cpu/amd/model_lx/Config.lb | 8 | ||||
| -rw-r--r-- | src/cpu/amd/model_lx/cpubug.c | 391 | ||||
| -rw-r--r-- | src/cpu/amd/model_lx/cpureginit.c | 251 | ||||
| -rw-r--r-- | src/cpu/amd/model_lx/model_lx_init.c | 47 | ||||
| -rw-r--r-- | src/cpu/amd/model_lx/syspreinit.c | 22 | ||||
| -rw-r--r-- | src/cpu/amd/model_lx/vsmsetup.c | 855 |
6 files changed, 1574 insertions, 0 deletions
diff --git a/src/cpu/amd/model_lx/Config.lb b/src/cpu/amd/model_lx/Config.lb new file mode 100644 index 0000000000..43c6254061 --- /dev/null +++ b/src/cpu/amd/model_lx/Config.lb @@ -0,0 +1,8 @@ +dir /cpu/x86/tsc +dir /cpu/x86/fpu +dir /cpu/x86/mmx +dir /cpu/x86/lapic +dir /cpu/x86/cache +driver model_lx_init.o +object cpubug.o +object vsmsetup.o
\ No newline at end of file diff --git a/src/cpu/amd/model_lx/cpubug.c b/src/cpu/amd/model_lx/cpubug.c new file mode 100644 index 0000000000..4bbab3f933 --- /dev/null +++ b/src/cpu/amd/model_lx/cpubug.c @@ -0,0 +1,391 @@ +#include <console/console.h> +#include <arch/io.h> +#include <stdint.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <stdlib.h> +#include <string.h> +#include <bitops.h> +#include <cpu/amd/lxdef.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/cache.h> + + +#if 0 +void +bug645(void){ + msr_t msr; + rdmsr(CPU_ID_CONFIG); + msr.whatever |= ID_CONFIG_SERIAL_SET; + wrmsr(msr); +} + +void +bug573(void){ + msr_t msr; + + msr = rdmsr(MC_GLD_MSR_PM); + msr.eax &= 0xfff3; + wrmsr(MC_GLD_MSR_PM); +} +#endif + +/************************************************************************** + * + * pcideadlock + * + * Bugtool #465 and #609 + * PCI cache deadlock + * There is also fix code in cache and PCI functions. This bug is very is pervasive. + * + * Entry: + * Exit: + * Modified: + * + **************************************************************************/ +static void +pcideadlock(void) +{ + msr_t msr; + + /* + * forces serialization of all load misses. Setting this bit prevents the + * DM pipe from backing up if a read request has to be held up waiting + * for PCI writes to complete. + */ + msr = rdmsr(CPU_DM_CONFIG0); + msr.hi &= ~(7<<DM_CONFIG0_UPPER_WSREQ_SHIFT); + msr.hi |= (2<<DM_CONFIG0_UPPER_WSREQ_SHIFT); + msr.lo |= DM_CONFIG0_LOWER_MISSER_SET; + wrmsr(CPU_DM_CONFIG0, msr); + + /* interlock instruction fetches to WS regions with data accesses. + * This prevents an instruction fetch from going out to PCI if the + * data side is about to make a request. + */ + msr = rdmsr(CPU_IM_CONFIG); + msr.lo |= IM_CONFIG_LOWER_QWT_SET; + wrmsr(CPU_IM_CONFIG, msr); + + /* write serialize memory hole to PCI. Need to unWS when something is + * shadowed regardless of cachablility. + */ + msr.lo = 0x021212121; + msr.hi = 0x021212121; + wrmsr( CPU_RCONF_A0_BF, msr); + wrmsr( CPU_RCONF_C0_DF, msr); + wrmsr( CPU_RCONF_E0_FF, msr); +} + +/**************************************************************************** + * + * CPUbug784 + * + * Bugtool #784 + #792 + * + * Fix CPUID instructions for < 3.0 CPUs + * + * Entry: + * Exit: + * Modified: + * + ****************************************************************************/ + +void bug784(void) +{ + msr_t msr; + //static char *name = "Geode by NSC"; + + /* we'll do this the stupid way, for now, but that's the string they want. NO ONE KNOWS why you + * would do this -- the OS can figure this type of stuff out! + */ + msr = rdmsr(0x3006); + msr.hi = 0x646f6547; + wrmsr(0x3006, msr); + + msr = rdmsr(0x3007); + msr.hi = 0x79622065; + msr.lo = 0x43534e20; + wrmsr(0x3007, msr); + + msr = rdmsr(0x3002); + wrmsr(0x3008, msr); + + /* More CPUID to match AMD better. #792*/ + msr = rdmsr(0x3009); + msr.hi = 0x0C0C0A13D; + msr.lo = 0x00000000; + wrmsr(0x3009, msr); +} + +/* cpubug 1398: enable MC if we KNOW we have DDR*/ +/************************************************************************** + * + * CPUbugIAENG1398 + * + * ClearQuest #IAENG1398 + * The MC can not be enabled with SDR memory but can for DDR. Enable for + * DDR here if the setup token is "Default" + * Add this back to core by default once 2.0 CPUs are not supported. + * Entry: + * Exit: + * Modified: + * + **************************************************************************/ +void eng1398(void) +{ + msr_t msr; + + msr = rdmsr(MSR_GLCP+0x17); + if ((msr.lo & 0xff) <= CPU_REV_2_0) { + msr = rdmsr(GLCP_SYS_RSTPLL); + if (msr.lo & (1<<RSTPPL_LOWER_SDRMODE_SHIFT)) + return; + } + + /* no CMOS/NVRAM to check, so enable MC Clock Gating */ + msr = rdmsr(MC_GLD_MSR_PM); + msr.lo |= 3; /* enable MC clock gating.*/ + wrmsr(MC_GLD_MSR_PM, msr); +} + +/*************************************************************************** + * + * CPUbugIAENG2900 + * + * Clear Quest IAENG00002900, VSS 118.150 + * + * BTB issue causes blue screen in windows, but the fix is required + * for all operating systems. + * + * Entry: + * Exit: + * Modified: + * + **************************************************************************/ +void +eng2900(void) +{ + msr_t msr; + + printk_debug("CPU_BUG:%s\n", __FUNCTION__); + /* Clear bit 43, disables the sysenter/sysexit in CPUID3 */ + msr = rdmsr(0x3003); + msr.hi &= 0xFFFFF7FF; + wrmsr(0x3003, msr); + + /* change this value to zero if you need to disable this BTB SWAPSiF. */ + if (1) { + + /* Disable enable_actions in DIAGCTL while setting up GLCP */ + msr.hi = 0; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x005f, msr); + + /* Changing DBGCLKCTL register to GeodeLink */ + msr.hi = 0; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x0016, msr); + + msr.hi = 0; + msr.lo = 2; + wrmsr(MSR_GLCP + 0x0016, msr); + + /* The code below sets up the CPU to stall for 4 GeodeLink + * clocks when CPU is snooped. Because setting XSTATE to 0 + * overrides any other XSTATE action, the code will always + * stall for 4 GeodeLink clocks after a snoop request goes + * away even if it occured a clock or two later than a + * different snoop; the stall signal will never 'glitch high' + * for only one or two CPU clocks with this code. + */ + + /* Send mb0 port 3 requests to upper GeodeLink diag bits + [63:32] */ + msr.hi = 0; + msr.lo = 0x80338041; + wrmsr(MSR_GLIU0 + 0x2005, msr); + + /* set5m watches request ready from mb0 to CPU (snoop) */ + msr.hi = 0x5ad68000; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x0045, msr); + + /* SET4M will be high when state is idle (XSTATE=11) */ + msr.hi = 0; + msr.lo = 0x0140; + wrmsr(MSR_GLCP + 0x0044, msr); + + /* SET5n to watch for processor stalled state */ + msr.hi = 0x2000; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x004D, msr); + + /* Writing action number 13: XSTATE=0 to occur when CPU is + snooped unless we're stalled */ + msr.hi = 0; + msr.lo = 0x00400000; + wrmsr(MSR_GLCP + 0x0075, msr); + + /* Writing action number 11: inc XSTATE every GeodeLink clock + unless we're idle */ + msr.hi = 0; + msr.lo = 0x30000; + wrmsr(MSR_GLCP + 0x0073, msr); + + /* Writing action number 5: STALL_CPU_PIPE when exitting idle + state or not in idle state */ + msr.hi = 0; + msr.lo = 0x00430000; + wrmsr(MSR_GLCP + 0x006D, msr); + + /* Writing DIAGCTL Register to enable the stall action and to + let set5m watch the upper GeodeLink diag bits. */ + msr.hi = 0; + msr.lo = 0x80004000; + wrmsr(MSR_GLCP + 0x005f, msr); + } +} + +void bug118253(void) +{ + /* GLPCI PIO Post Control shouldn't be enabled */ + msr_t msr; + + msr = rdmsr(GLPCI_SPARE); + msr.lo &= ~GLPCI_SPARE_LOWER_PPC_SET; + wrmsr(GLPCI_SPARE, msr); +} + +void bug118339(void) +{ + /* per AMD, do this always */ + msr_t msr = {0,0}; + int msrnum; + + /* Disable enable_actions in DIAGCTL while setting up GLCP */ + wrmsr(MSR_GLCP + 0x005f, msr); + + /* SET2M fires if VG pri is odd (3, not 2) and Ystate=0 */ + msrnum = MSR_GLCP + 0x042; + /* msr.hi = 2d6b8000h */; + msr.hi = 0x596b8000; + msr.lo = 0x00000a00; + wrmsr(msrnum, msr); + + /* SET3M fires if MBUS changed and VG pri is odd */ + msrnum = MSR_GLCP + 0x043; + msr.hi = 0x596b8040; + msr.lo = 0; + wrmsr(msrnum, msr); + + /* Put VG request data on lower diag bus */ + msrnum = MSR_GLIU0 + 0x2005; + msr.hi = 0; + msr.lo = 0x80338041; + wrmsr(msrnum, msr); + + /* Increment Y state if SET3M if true */ + msrnum = MSR_GLCP + 0x074; + msr.hi = 0; + msr.lo = 0x0000c000; + wrmsr(msrnum, msr); + + /* Set up MBUS action to PRI=3 read of MBIU */ + msrnum = MSR_GLCP + 0x020; + msr.hi = 0x0000d863; + msr.lo = 0x20002000; + wrmsr(msrnum, msr); + + /* Trigger MBUS action if VG=pri3 and Y=0, this blocks most PCI */ + msrnum = MSR_GLCP + 0x071; + msr.hi = 0; + msr.lo = 0x00000c00; + wrmsr(msrnum, msr); + + /* Writing DIAGCTL */ + msrnum = MSR_GLCP + 0x005f; + msr.hi = 0; + msr.lo = 0x80004000; + wrmsr(msrnum, msr); + + /* Code to enable FS2 even when BTB and VGTEAR SWAPSiFs are enabled */ + /* As per Todd Roberts in PBz1094 and PBz1095 */ + /* Moved from CPUREG to CPUBUG per Tom Sylla */ + msrnum = 0x04C000042; /* GLCP SETMCTL Register */; + msr = rdmsr(msrnum); + msr.hi |= 8; /* Bit 35 = MCP_IN */ + wrmsr(msrnum, msr); +} + + + +/****************************************************************************/ +/***/ +/** DisableMemoryReorder*/ +/***/ +/** PBZ 3659:*/ +/** The MC reordered transactions incorrectly and breaks coherency.*/ +/** Disable reording and take a potential performance hit.*/ +/** This is safe to do here and not in MC init since there is nothing*/ +/** to maintain coherency with and the cache is not enabled yet.*/ +/***/ +/***/ +/** Entry:*/ +/** Exit:*/ +/** Modified:*/ +/***/ +/****************************************************************************/ +void disablememoryreadorder(void) +{ + msr_t msr; + msr = rdmsr(MC_CF8F_DATA); + + msr.hi |= CF8F_UPPER_REORDER_DIS_SET; + wrmsr(MC_CF8F_DATA, msr); +} + +void +cpubug(void) +{ + msr_t msr; + int rev; +#if 0 //GX3 + msr = rdmsr(GLCP_CHIP_REVID); + + rev = msr.lo & 0xff; + if (rev < 0x20) { + printk_err("%s: rev < 0x20! bailing!\n"); + return; + } + printk_debug("Doing cpubug fixes for rev 0x%x\n", rev); + switch(rev) + { + case 0x20: + pcideadlock(); + eng1398(); + /* cs 5530 bug; ignore + bug752(); + */ + break; + case 0x21: + pcideadlock(); + eng1398(); + eng2900(); + bug118339(); + break; + case 0x22: + case 0x30: + break; + default: + printk_err("unknown rev %x, bailing\n", rev); + return; + } + bug784(); + bug118253(); + disablememoryreadorder(); + printk_debug("Done cpubug fixes \n"); +#endif + +} diff --git a/src/cpu/amd/model_lx/cpureginit.c b/src/cpu/amd/model_lx/cpureginit.c new file mode 100644 index 0000000000..58576c2fcd --- /dev/null +++ b/src/cpu/amd/model_lx/cpureginit.c @@ -0,0 +1,251 @@ + + +/* ***************************************************************************/ +/* **/ +/* * BIST */ +/* **/ +/* * GX2 BISTs need to be run before BTB or caches are enabled.*/ +/* * BIST result left in registers on failure to be checked with FS2.*/ +/* **/ +/* ***************************************************************************/ +static void +BIST(void){ + int msrnum; + msr_t msr; + + /* DM*/ + msrnum = CPU_DM_CONFIG0; + msr = rdmsr(msrnum); + msr.lo |= DM_CONFIG0_LOWER_DCDIS_SET; + wrmsr(msrnum, msr); + + msr.lo = 0x00000003F; + msr.hi = 0x000000000; + msrnum = CPU_DM_BIST; + wrmsr(msrnum, msr); + + outb(POST_CPU_DM_BIST_FAILURE, 0x80); /* 0x29*/ + msr = rdmsr(msrnum); /* read back for pass fail*/ + msr.lo &= 0x0F3FF0000; + if (msr.lo != 0xfeff0000) + goto BISTFail; + + msrnum = CPU_DM_CONFIG0; + msr = rdmsr(msrnum); + msr.lo &= ~ DM_CONFIG0_LOWER_DCDIS_SET; + wrmsr(msrnum, msr); + + /* FPU*/ + msr.lo = 0x000000131; + msr.hi = 0; + msrnum = CPU_FP_UROM_BIST; + wrmsr(msrnum, msr); + + outb(POST_CPU_FPU_BIST_FAILURE, 0x80); /* 0x89*/ + inb(0x80); /* IO delay*/ + msr = rdmsr(msrnum); /* read back for pass fail*/ + while ((msr.lo&0x884) != 0x884) + msr = rdmsr(msrnum); /* Endless loop if BIST is broken*/ + if ((msr.lo&0x642) != 0x642) + goto BISTFail; + + msr.lo = msr.hi = 0; /* clear FPU BIST bits*/ + msrnum = CPU_FP_UROM_BIST; + wrmsr(msrnum, msr); + + + /* BTB*/ + msr.lo = 0x000000303; + msr.hi = 0x000000000; + msrnum = CPU_PF_BTBRMA_BIST; + wrmsr(msrnum, msr); + + outb(POST_CPU_BTB_BIST_FAILURE , 0x80); /* 0x8A*/ + msr = rdmsr(msrnum); /* read back for pass fail*/ + if ((msr.lo & 0x3030) != 0x3030) + goto BISTFail; + + return; + +BISTFail: + print_err("BIST failed!\n"); + while(1); +} +/* ***************************************************************************/ +/* * cpuRegInit*/ +/* ***************************************************************************/ +void +cpuRegInit (void){ + int msrnum; + msr_t msr; + + //GX3 suspend: what is desired? + + /* Enable Suspend on Halt*/ + /*msrnum = CPU_XC_CONFIG; + msr = rdmsr(msrnum); + msr.lo |= XC_CONFIG_SUSP_ON_HLT; + wrmsr(msrnum, msr);*/ + + /* ENable SUSP and allow TSC to run in Suspend */ + /* to keep speed detection happy*/ + /*msrnum = CPU_BC_CONF_0; + msr = rdmsr(msrnum); + msr.lo |= TSC_SUSP_SET | SUSP_EN_SET; + wrmsr(msrnum, msr);*/ + + /* Setup throttling to proper mode if it is ever enabled.*/ + msrnum = 0x04C00001E; + msr.hi = 0x000000000; + msr.lo = 0x00000603C; + wrmsr(msrnum, msr); // GX3 OK +/- + + +/* Only do this if we are building for 5535*/ +/* */ +/* FooGlue Setup*/ +/* */ +#if 0 + /* Enable CIS mode B in FooGlue*/ + msrnum = MSR_FG + 0x10; + msr = rdmsr(msrnum); + msr.lo &= ~3; + msr.lo |= 2; /* ModeB*/ + wrmsr(msrnum, msr); +#endif + +/* */ +/* Disable DOT PLL. Graphics init will enable it if needed.*/ +/* */ + +// GX3: Disable DOT PLL? No. Lets tick. + +/* msrnum = GLCP_DOTPLL; + msr = rdmsr(msrnum); + msr.lo |= DOTPPL_LOWER_PD_SET; + wrmsr(msrnum, msr); */ + +/* */ +/* Enable RSDC*/ +/* */ + msrnum = 0x1301 ; + msr = rdmsr(msrnum); + msr.lo |= 0x08; + wrmsr(msrnum, msr); //GX3 OK + + +/* */ +/* BIST*/ +/* */ + /*if (getnvram( TOKEN_BIST_ENABLE) & == TVALUE_DISABLE) {*/ + { +// BIST(); + } + + +/* */ +/* Enable BTB*/ +/* */ + /* I hate to put this check here but it doesn't really work in cpubug.asm*/ + +//GX3: BTB is enabled by default + +/* msrnum = MSR_GLCP+0x17; + msr = rdmsr(msrnum); + if (msr.lo >= CPU_REV_2_1){ + msrnum = CPU_PF_BTB_CONF; + msr = rdmsr(msrnum); + msr.lo |= BTB_ENABLE_SET | RETURN_STACK_ENABLE_SET; + wrmsr(msrnum, msr); + } + + */ + +/* */ +/* FPU impercise exceptions bit*/ +/* */ + /*if (getnvram( TOKEN_FPU_IE_ENABLE) != TVALUE_DISABLE) {*/ + + + +// GX3: FPU impercise exceptions bit - what's that? +/* { + msrnum = CPU_FPU_MSR_MODE; + msr = rdmsr(msrnum); + msr.lo |= FPU_IE_SET; + wrmsr(msrnum, msr); + } + + */ + +#if 0 + /* */ + /* Cache Overides*/ + /* */ + /* This code disables the data cache. Don't execute this + * unless you're testing something. + */ + /* Allow NVRam to override DM Setup*/ + /*if (getnvram( TOKEN_CACHE_DM_MODE) != 1) {*/ + { + + msrnum = CPU_DM_CONFIG0; + msr = rdmsr(msrnum); + msr.lo |= DM_CONFIG0_LOWER_DCDIS_SET; + wrmsr(msrnum, msr); + } + /* This code disables the instruction cache. Don't execute + * this unless you're testing something. + */ + /* Allow NVRam to override IM Setup*/ + /*if (getnvram( TOKEN_CACHE_IM_MODE) ==1) {*/ + { + msrnum = CPU_IM_CONFIG; + msr = rdmsr(msrnum); + msr.lo |= IM_CONFIG_LOWER_ICD_SET; + wrmsr(msrnum, msr); + } +#endif +} + + + + +/* ***************************************************************************/ +/* **/ +/* * MTestPinCheckBX*/ +/* **/ +/* * Set MTEST pins to expected values from OPTIONS.INC/NVRAM*/ +/* * This version is called when there isn't a stack available*/ +/* **/ +/* ***************************************************************************/ +static void +MTestPinCheckBX (void){ + int msrnum; + msr_t msr; + + /*if (getnvram( TOKEN_MTEST_ENABLE) ==TVALUE_DISABLE ) {*/ + /* return ; */ + /* } */ + + /* Turn on MTEST*/ + msrnum = MC_CFCLK_DBUG; + msr = rdmsr(msrnum); + msr.hi |= CFCLK_UPPER_MTST_B2B_DIS_SET | CFCLK_UPPER_MTEST_EN_SET; + wrmsr(msrnum, msr); + + msrnum = GLCP_SYS_RSTPLL /* Get SDR/DDR mode from GLCP*/; + msr = rdmsr(msrnum); + msr.lo >>= RSTPPL_LOWER_SDRMODE_SHIFT; + if (msr.lo & 1) { + msrnum = MC_CFCLK_DBUG; /* Turn on SDR MTEST stuff*/ + msr = rdmsr(msrnum); + msr.lo |= CFCLK_LOWER_SDCLK_SET; + msr.hi |= CFCLK_UPPER_MTST_DQS_EN_SET; + wrmsr(msrnum, msr); + } + + /* Lock the cache down here.*/ + __asm__("wbinvd\n"); + +} diff --git a/src/cpu/amd/model_lx/model_lx_init.c b/src/cpu/amd/model_lx/model_lx_init.c new file mode 100644 index 0000000000..f7787538a9 --- /dev/null +++ b/src/cpu/amd/model_lx/model_lx_init.c @@ -0,0 +1,47 @@ +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <string.h> +#include <cpu/cpu.h> +#include <cpu/x86/lapic.h> +#include <cpu/x86/cache.h> + + +static void vsm_end_post_smi(void) +{ + __asm__ volatile ( + "push %ax\n" + "mov $0x5000, %ax\n" + ".byte 0x0f, 0x38\n" + "pop %ax\n" + ); +} + +static void model_lx_init(device_t dev) +{ + printk_debug("model_lx_init\n"); + + /* Turn on caching if we haven't already */ + x86_enable_cache(); + + /* Enable the local cpu apics */ + //setup_lapic(); + + vsm_end_post_smi(); + + printk_debug("model_lx_init DONE\n"); +}; + +static struct device_operations cpu_dev_ops = { + .init = model_lx_init, +}; + +static struct cpu_device_id cpu_table[] = { + { X86_VENDOR_AMD, 0x05A2 }, + { 0, 0 }, +}; + +static struct cpu_driver driver __cpu_driver = { + .ops = &cpu_dev_ops, + .id_table = cpu_table, +}; diff --git a/src/cpu/amd/model_lx/syspreinit.c b/src/cpu/amd/model_lx/syspreinit.c new file mode 100644 index 0000000000..e3ad95235d --- /dev/null +++ b/src/cpu/amd/model_lx/syspreinit.c @@ -0,0 +1,22 @@ +/* ***************************************************************************/ +/* **/ +/* * StartTimer1*/ +/* **/ +/* * Entry: none*/ +/* * Exit: Starts Timer 1 for port 61 use*/ +/* * Destroys: Al,*/ +/* **/ +/* ***************************************************************************/ +void +StartTimer1(void){ + outb(0x56, 0x43); + outb(0x12, 0x41); +} + +void +SystemPreInit(void){ + + /* they want a jump ... */ + __asm__("jmp .+2\ninvd\njmp.+2\n"); + StartTimer1(); +} diff --git a/src/cpu/amd/model_lx/vsmsetup.c b/src/cpu/amd/model_lx/vsmsetup.c new file mode 100644 index 0000000000..d8381debed --- /dev/null +++ b/src/cpu/amd/model_lx/vsmsetup.c @@ -0,0 +1,855 @@ +#include <console/console.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#undef __KERNEL__ +#include <arch/io.h> +#include <string.h> +#include <cpu/amd/lxdef.h> + +/* what a mess this uncompress thing is. I am not at all happy about how this + * was done, but can't fix it yet. RGM + */ +#warning "Fix the uncompress once linuxbios knows how to do it" +// This GETBIT is supposed to work on little endian +// 32bit systems. The algorithm will definitely need +// some fixing on other systems, but it might not be +// a problem since the nrv2b binary behaves the same.. + +#ifndef ENDIAN +#define ENDIAN 0 +#endif +#ifndef BITSIZE +#define BITSIZE 32 +#endif + +#define GETBIT_8(bb, src, ilen) \ + (((bb = bb & 0x7f ? bb*2 : ((unsigned)src[ilen++]*2+1)) >> 8) & 1) + +#define GETBIT_LE16(bb, src, ilen) \ + (bb*=2,bb&0xffff ? (bb>>16)&1 : (ilen+=2,((bb=(src[ilen-2]+src[ilen-1]*256u)*2+1)>>16)&1)) +#define GETBIT_LE32(bb, src, ilen) \ + (bc > 0 ? ((bb>>--bc)&1) : (bc=31,\ + bb=*(const uint32_t *)((src)+ilen),ilen+=4,(bb>>31)&1)) + +#if ENDIAN == 0 && BITSIZE == 8 +#define GETBIT(bb, src, ilen) GETBIT_8(bb, src, ilen) +#endif +#if ENDIAN == 0 && BITSIZE == 16 +#define GETBIT(bb, src, ilen) GETBIT_LE16(bb, src, ilen) +#endif +#if ENDIAN == 0 && BITSIZE == 32 +#define GETBIT(bb, src, ilen) GETBIT_LE32(bb, src, ilen) +#endif + +static unsigned long unrv2b(uint8_t * src, uint8_t * dst) +{ + unsigned long ilen = 0, olen = 0, last_m_off = 1; + uint32_t bb = 0; + unsigned bc = 0; + const uint8_t *m_pos; + unsigned long file_len = *(unsigned long *) src; + + printk_debug("compressed file len is supposed to be %d bytes\n", file_len); + // skip length + src += 4; + /* FIXME: check olen with the length stored in first 4 bytes */ + + for (;;) { + unsigned int m_off, m_len; + while (GETBIT(bb, src, ilen)) { + dst[olen++] = src[ilen++]; + } + + m_off = 1; + do { + m_off = m_off * 2 + GETBIT(bb, src, ilen); + } while (!GETBIT(bb, src, ilen)); + if (m_off == 2) { + m_off = last_m_off; + } else { + m_off = (m_off - 3) * 256 + src[ilen++]; + if (m_off == 0xffffffffU) + break; + last_m_off = ++m_off; + } + + m_len = GETBIT(bb, src, ilen); + m_len = m_len * 2 + GETBIT(bb, src, ilen); + if (m_len == 0) { + m_len++; + do { + m_len = m_len * 2 + GETBIT(bb, src, ilen); + } while (!GETBIT(bb, src, ilen)); + m_len += 2; + } + m_len += (m_off > 0xd00); + + m_pos = dst + olen - m_off; + dst[olen++] = *m_pos++; + do { + dst[olen++] = *m_pos++; + } while (--m_len > 0); + } + + printk_debug("computed len is %d, file len is %d\n", olen, file_len); + return olen; + +} + +/* vsmsetup.c derived from vgabios.c. Derived from: */ + +/*------------------------------------------------------------ -*- C -*- + * 2 Kernel Monte a.k.a. Linux loading Linux on x86 + * + * Erik Arjan Hendriks <hendriks@lanl.gov> + * + * This version is a derivative of the original two kernel monte + * which is (C) 2000 Scyld. + * + * Copyright (C) 2000 Scyld Computing Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Portions related to the alpha architecture are: + * + * Copyright(C) 2001 University of California. LA-CC Number 01-67. + * This software has been authored by an employee or employees of the + * University of California, operator of the Los Alamos National + * Laboratory under Contract No. W-7405-ENG-36 with the U.S. + * Department of Energy. The U.S. Government has rights to use, + * reproduce, and distribute this software. If the software is + * modified to produce derivative works, such modified software should + * be clearly marked, so as not to confuse it with the version + * available from LANL. + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by + * reference to http://www.gnu.org/licenses/gpl.html. + * + * This software is provided by the author(s) "as is" and any express + * or implied warranties, including, but not limited to, the implied + * warranties of merchantability and fitness for a particular purpose + * are disclaimed. In no event shall the author(s) be liable for any + * 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) arising in any way out of the use of this + * software, even if advised of the possibility of such damage. + * + * $Id: Exp $ + *--------------------------------------------------------------------*/ + +/* Modified to be a self sufficient plug in so that it can be used + without reliance on other parts of core Linuxbios + (C) 2005 Nick.Barker9@btinternet.com + + Used initially for epia-m where there are problems getting the bios + emulator to successfully run this bios. +*/ + +/* Declare a temporary global descriptor table - necessary because the + Core part of the bios no longer sets up any 16 bit segments */ +__asm__ ( + /* pointer to original gdt */ + "gdtarg: \n" + " .word gdt_limit \n" + " .long gdt \n" + + /* compute the table limit */ + "__mygdt_limit = __mygdt_end - __mygdt - 1 \n" + + "__mygdtaddr: \n" + " .word __mygdt_limit \n" + " .long __mygdt \n" + + "__mygdt: \n" + /* selgdt 0, unused */ + " .word 0x0000, 0x0000 \n" + " .byte 0x00, 0x00, 0x00, 0x00 \n" + + /* selgdt 8, unused */ + " .word 0x0000, 0x0000 \n" + " .byte 0x00, 0x00, 0x00, 0x00 \n" + + /* selgdt 0x10, flat code segment */ + " .word 0xffff, 0x0000 \n" + " .byte 0x00, 0x9b, 0xcf, 0x00 \n" + + /* selgdt 0x18, flat data segment */ + " .word 0xffff, 0x0000 \n" + " .byte 0x00, 0x93, 0xcf, 0x00 \n" + + /* selgdt 0x20, unused */ + " .word 0x0000, 0x0000 \n" + " .byte 0x00, 0x00, 0x00, 0x00 \n" + + /* selgdt 0x28 16-bit 64k code at 0x00000000 */ + " .word 0xffff, 0x0000 \n" + " .byte 0, 0x9a, 0, 0 \n" + + /* selgdt 0x30 16-bit 64k data at 0x00000000 */ + " .word 0xffff, 0x0000 \n" + " .byte 0, 0x92, 0, 0 \n" + + "__mygdt_end: \n" +); + +/* Declare a pointer to where our idt is going to be i.e. at mem zero */ +__asm__ ("__myidt: \n" + /* 16-bit limit */ + " .word 1023 \n" + /* 24-bit base */ + " .long 0 \n" + " .word 0 \n" +); + +/* The address arguments to this function are PHYSICAL ADDRESSES */ +static void real_mode_switch_call_vsm(unsigned long smm, unsigned long sysm) +{ + __asm__ __volatile__ ( + // paranoia -- does ecx get saved? not sure. This is + // the easiest safe thing to do. + " pushal \n" + /* save the stack */ + " mov %esp, __stack \n" + " jmp 1f \n" + "__stack: .long 0 \n" + "1:\n" + /* get devfn into %ecx */ + " movl %esp, %ebp \n" +#if 0 + /* I'm not happy about that pushal followed by esp-relative references. + * just do hard-codes for now + */ + " movl 8(%ebp), %ecx \n" + " movl 12(%ebp), %edx \n" +#endif + " movl $0x10000026, %ecx \n" + " movl $0x10000028, %edx \n" + + /* load 'our' gdt */ + " lgdt %cs:__mygdtaddr \n" + + /* This configures CS properly for real mode. */ + " ljmp $0x28, $__rms_16bit\n" + "__rms_16bit: \n" + " .code16 \n" + /* 16 bit code from here on... */ + + /* Load the segment registers w/ properly configured segment + * descriptors. They will retain these configurations (limits, + * writability, etc.) once protected mode is turned off. */ + " mov $0x30, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* Turn off protection (bit 0 in CR0) */ + " movl %cr0, %eax \n" + " andl $0xFFFFFFFE, %eax \n" + " movl %eax, %cr0 \n" + + /* Now really going into real mode */ + " ljmp $0, $__rms_real\n" + "__rms_real: \n" + + /* put the stack at the end of page zero. + * that way we can easily share it between real and protected, + * since the 16-bit ESP at segment 0 will work for any case. */ + /* Setup a stack */ + " mov $0x0, %ax \n" + " mov %ax, %ss \n" + " movl $0x1000, %eax \n" + " movl %eax, %esp \n" + + /* Load our 16 it idt */ + " xor %ax, %ax \n" + " mov %ax, %ds \n" + " lidt __myidt \n" + + /* Dump zeros in the other segregs */ + " mov %ax, %es \n" + /* FixMe: Big real mode for gs, fs? */ + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov $0x40, %ax \n" + " mov %ax, %ds \n" + //" mov %cx, %ax \n" + " movl $0x10000026, %ecx \n" + " movl $0x10000028, %edx \n" + + /* run VGA BIOS at 0x6000:0020 */ + " lcall $0x6000, $0x0020\n" + + /* if we got here, just about done. + * Need to get back to protected mode */ + " movl %cr0, %eax \n" + " orl $0x0000001, %eax\n" /* PE = 1 */ + " movl %eax, %cr0 \n" + + /* Now that we are in protected mode jump to a 32 bit code segment. */ + " data32 ljmp $0x10, $vsmrestart\n" + "vsmrestart:\n" + " .code32\n" + " movw $0x18, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* restore proper gdt and idt */ + " lgdt %cs:gdtarg \n" + " lidt idtarg \n" + + ".globl vsm_exit \n" + "vsm_exit: \n" + " mov __stack, %esp \n" + " popal \n" + ); +} + +__asm__ (".text\n""real_mode_switch_end:\n"); +extern char real_mode_switch_end[]; + + +void do_vsmbios(void) +{ + device_t dev; + unsigned long busdevfn; + unsigned int rom = 0; + unsigned char *buf; + unsigned int size = SMM_SIZE*1024; + int i; + + printk_err("do_vsmbios\n"); + /* clear vsm bios data area */ + for (i = 0x400; i < 0x500; i++) { + *(unsigned char *) i = 0; + } + + /* declare rom address here - keep any config data out of the way + * of core LXB stuff */ + + /* this is the base of rom on the GX2 at present. At some point, this has to be + * much better parameterized + */ + //rom = 0xfff80000; + //rom = 0xfffc0000; + /* the VSA starts at the base of rom - 64 */ + //rom = ((unsigned long) 0) - (ROM_SIZE + 64*1024); + + rom = 0xfffc0000; + + buf = (unsigned char *) 0x60000; + unrv2b((uint8_t *)rom, buf); + printk_debug("buf %p *buf %d buf[256k] %d\n", + buf, buf[0], buf[SMM_SIZE*1024]); + printk_debug("buf[0x20] signature is %x:%x:%x:%x\n", + buf[0x20] ,buf[0x21] ,buf[0x22],buf[0x23]); + /* check for post code at start of vsainit.bin. If you don't see it, + don't bother. */ + if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) || + (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) { + printk_err("do_vsmbios: no vsainit.bin signature, skipping!\n"); + return; + } + + //memcpy((void *) 0x60000, buf, size); + + //for (i = 0; i < 0x800000; i++) + // outb(0xaa, 0x80); + + /* ecx gets smm, edx gets sysm */ + printk_err("Call real_mode_switch_call_vsm\n"); + real_mode_switch_call_vsm(0x10000026, 0x10000028); + + /* restart timer 1 */ + outb(0x56, 0x43); + outb(0x12, 0x41); +} + + +// we had hoped to avoid this. +// this is a stub IDT only. It's main purpose is to ignore calls +// to the BIOS. +// no longer. Dammit. We have to respond to these. +struct realidt { + unsigned short offset, cs; +}; + +// from a handy writeup that andrey found. + +// handler. +// There are some assumptions we can make here. +// First, the Top Of Stack (TOS) is located on the top of page zero. +// we can share this stack between real and protected mode. +// that simplifies a lot of things ... +// we'll just push all the registers on the stack as longwords, +// and pop to protected mode. +// second, since this only ever runs as part of linuxbios, +// we know all the segment register values -- so we don't save any. +// keep the handler that calls things small. It can do a call to +// more complex code in linuxbios itself. This helps a lot as we don't +// have to do address fixup in this little stub, and calls are absolute +// so the handler is relocatable. +void handler(void) +{ + __asm__ __volatile__ ( + " .code16 \n" + "idthandle: \n" + " pushal \n" + " movb $0, %al \n" + " ljmp $0, $callbiosint16\n" + "end_idthandle: \n" + " .code32 \n" + ); +} + +void debughandler(void) +{ + __asm__ __volatile__ ( + " .code16 \n" + "debughandle: \n" + " pushw %cx \n" + " movw $250, %cx \n" + "dbh1: \n" + " loop dbh1 \n" + " popw %cx \n" + " iret \n" + "end_debughandle: \n" + ".code32 \n" + ); +} + +// Calling conventions. The first C function is called with this stuff +// on the stack. They look like value parameters, but note that if you +// modify them they will go back to the INTx function modified. +// the C function will call the biosint function with these as +// REFERENCE parameters. In this way, we can easily get +// returns back to the INTx caller (i.e. vgabios) +void callbiosint(void) +{ + __asm__ __volatile__ ( + " .code16 \n" + "callbiosint16: \n" + " push %ds \n" + " push %es \n" + " push %fs \n" + " push %gs \n" + // clean up the int #. To save space we put it in the lower + // byte. But the top 24 bits are junk. + " andl $0xff, %eax\n" + // this push does two things: + // - put the INT # on the stack as a parameter + // - provides us with a temp for the %cr0 mods. + " pushl %eax \n" + " movb $0xbb, %al\n" + " outb %al, $0x80\n" + " movl %cr0, %eax\n" + " orl $0x00000001, %eax\n" /* PE = 1 */ + " movl %eax, %cr0\n" + /* Now that we are in protected mode jump to a 32 bit code segment. */ + " data32 ljmp $0x10, $biosprotect\n" + "biosprotect: \n" + " .code32 \n" + " movw $0x18, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + " lidt idtarg \n" + " call biosint \n" + // back to real mode ... + " ljmp $0x28, $__rms_16bit2\n" + "__rms_16bit2: \n" + " .code16 \n" + /* 16 bit code from here on... */ + /* Load the segment registers w/ properly configured segment + * descriptors. They will retain these configurations (limits, + * writability, etc.) once protected mode is turned off. */ + " mov $0x30, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* Turn off protection (bit 0 in CR0) */ + " movl %cr0, %eax \n" + " andl $0xFFFFFFFE, %eax \n" + " movl %eax, %cr0 \n" + + /* Now really going into real mode */ + " ljmp $0, $__rms_real2 \n" + "__rms_real2: \n" + + /* Setup a stack + * FixME: where is esp? */ + /* no need for a fix here. The esp is shared from 32-bit and 16-bit mode. + * you have to hack on the ss, but the esp remains the same across + * modes. + */ + " mov $0x0, %ax \n" + " mov %ax, %ss \n" + + /* debugging for RGM */ + " mov $0x11, %al \n" + " outb %al, $0x80 \n" + + /* Load our 16 bit idt */ + " xor %ax, %ax \n" + " mov %ax, %ds \n" + " lidt __myidt \n" + + /* Dump zeros in the other segregs */ + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov $0x40, %ax \n" + " mov %ax, %ds \n" + + /* pop the INT # that you pushed earlier */ + " popl %eax \n" + " pop %gs \n" + " pop %fs \n" + " pop %es \n" + " pop %ds \n" + " popal \n" + " iret \n" + " .code32 \n" + ); +} + +enum { + PCIBIOS = 0x1a, + MEMSIZE = 0x12 +}; + +int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, + unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, + unsigned long *pecx, unsigned long *peax, unsigned long *pflags); + +int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, + unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, + unsigned long *pecx, unsigned long *peax, unsigned long *pflags + ); + +int biosint(unsigned long intnumber, + unsigned long gsfs, unsigned long dses, + unsigned long edi, unsigned long esi, + unsigned long ebp, unsigned long esp, + unsigned long ebx, unsigned long edx, + unsigned long ecx, unsigned long eax, + unsigned long cs_ip, unsigned short stackflags) +{ + unsigned long ip; + unsigned long cs; + unsigned long flags; + int ret = -1; + + ip = cs_ip & 0xffff; + cs = cs_ip >> 16; + flags = stackflags; + + printk_debug("biosint: INT# 0x%lx\n", intnumber); + printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", + eax, ebx, ecx, edx); + printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", + ebp, esp, edi, esi); + printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n", + ip, cs, flags); + printk_debug("biosint: gs 0x%x fs 0x%x ds 0x%x es 0x%x\n", + gsfs >> 16, gsfs & 0xffff, dses >> 16, dses & 0xffff); + + // cases in a good compiler are just as good as your own tables. + switch (intnumber) { + case 0 ... 15: + // These are not BIOS service, but the CPU-generated exceptions + printk_info("biosint: Oops, exception %u\n", intnumber); + if (esp < 0x1000) { + printk_debug("Stack contents: "); + while (esp < 0x1000) { + printk_debug("0x%04x ", *(unsigned short *) esp); + esp += 2; + } + printk_debug("\n"); + } + printk_debug("biosint: Bailing out ... not now\n"); + // "longjmp" + //vga_exit(); + break; + + case PCIBIOS: + ret = pcibios( &edi, &esi, &ebp, &esp, + &ebx, &edx, &ecx, &eax, &flags); + break; + case MEMSIZE: + // who cares. + eax = 64 * 1024; + ret = 0; + break; + case 0x15: + ret=handleint21( &edi, &esi, &ebp, &esp, + &ebx, &edx, &ecx, &eax, &flags); + break; + default: + printk_info("BIOSINT: Unsupport int #0x%x\n", + intnumber); + break; + } + if (ret) + flags |= 1; // carry flags + else + flags &= ~1; + stackflags = flags; + return ret; +} + + +void setup_realmode_idt(void) +{ + extern unsigned char idthandle, end_idthandle; + extern unsigned char debughandle, end_debughandle; + + int i; + struct realidt *idts = (struct realidt *) 0; + int codesize = &end_idthandle - &idthandle; + unsigned char *intbyte, *codeptr; + + // for each int, we create a customized little handler + // that just pushes %ax, puts the int # in %al, + // then calls the common interrupt handler. + // this necessitated because intel didn't know much about + // architecture when they did the 8086 (it shows) + // (hmm do they know anymore even now :-) + // obviously you can see I don't really care about memory + // efficiency. If I did I would probe back through the stack + // and get it that way. But that's really disgusting. + for (i = 0; i < 256; i++) { + idts[i].cs = 0; + codeptr = (char*) 4096 + i * codesize; + idts[i].offset = (unsigned) codeptr; + memcpy(codeptr, &idthandle, codesize); + intbyte = codeptr + 3; + *intbyte = i; + } + + // fixed entry points + + // VGA BIOSes tend to hardcode f000:f065 as the previous handler of + // int10. + // calling convention here is the same as INTs, we can reuse + // the int entry code. + codeptr = (char*) 0xff065; + memcpy(codeptr, &idthandle, codesize); + intbyte = codeptr + 3; + *intbyte = 0x42; /* int42 is the relocated int10 */ + + /* debug handler - useful to set a programmable delay between instructions if the + TF bit is set upon call to real mode */ + idts[1].cs = 0; + idts[1].offset = 16384; + memcpy(16384, &debughandle, &end_debughandle - &debughandle); +} + + + +enum { + CHECK = 0xb001, + FINDDEV = 0xb102, + READCONFBYTE = 0xb108, + READCONFWORD = 0xb109, + READCONFDWORD = 0xb10a, + WRITECONFBYTE = 0xb10b, + WRITECONFWORD = 0xb10c, + WRITECONFDWORD = 0xb10d +}; + +// errors go in AH. Just set these up so that word assigns +// will work. KISS. +enum { + PCIBIOS_NODEV = 0x8600, + PCIBIOS_BADREG = 0x8700 +}; + +int +pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, + unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, + unsigned long *pecx, unsigned long *peax, unsigned long *pflags) +{ + unsigned long edi = *pedi; + unsigned long esi = *pesi; + unsigned long ebp = *pebp; + unsigned long esp = *pesp; + unsigned long ebx = *pebx; + unsigned long edx = *pedx; + unsigned long ecx = *pecx; + unsigned long eax = *peax; + unsigned long flags = *pflags; + unsigned short func = (unsigned short) eax; + int retval = 0; + unsigned short devid, vendorid, devfn; + short devindex; /* Use short to get rid of gabage in upper half of 32-bit register */ + unsigned char bus; + device_t dev; + + switch(func) { + case CHECK: + *pedx = 0x4350; + *pecx = 0x2049; + retval = 0; + break; + case FINDDEV: + { + devid = *pecx; + vendorid = *pedx; + devindex = *pesi; + dev = 0; + while ((dev = dev_find_device(vendorid, devid, dev))) { + if (devindex <= 0) + break; + devindex--; + } + if (dev) { + unsigned short busdevfn; + *peax = 0; + // busnum is an unsigned char; + // devfn is an int, so we mask it off. + busdevfn = (dev->bus->secondary << 8) + | (dev->path.u.pci.devfn & 0xff); + printk_debug("0x%x: return 0x%x\n", func, busdevfn); + *pebx = busdevfn; + retval = 0; + } else { + *peax = PCIBIOS_NODEV; + retval = -1; + } + } + break; + case READCONFDWORD: + case READCONFWORD: + case READCONFBYTE: + case WRITECONFDWORD: + case WRITECONFWORD: + case WRITECONFBYTE: + { + unsigned long dword; + unsigned short word; + unsigned char byte; + unsigned char reg; + + devfn = *pebx & 0xff; + bus = *pebx >> 8; + reg = *pedi; + dev = dev_find_slot(bus, devfn); + if (! dev) { + printk_debug("0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn); + // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn! + *peax = PCIBIOS_BADREG; + retval = -1; + } + switch(func) { + case READCONFBYTE: + byte = pci_read_config8(dev, reg); + *pecx = byte; + break; + case READCONFWORD: + word = pci_read_config16(dev, reg); + *pecx = word; + break; + case READCONFDWORD: + dword = pci_read_config32(dev, reg); + *pecx = dword; + break; + case WRITECONFBYTE: + byte = *pecx; + pci_write_config8(dev, reg, byte); + break; + case WRITECONFWORD: + word = *pecx; + pci_write_config16(dev, reg, word); + break; + case WRITECONFDWORD: + dword = *pecx; + pci_write_config32(dev, reg, dword); + break; + } + + if (retval) + retval = PCIBIOS_BADREG; + printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", + func, bus, devfn, reg, *pecx); + *peax = 0; + retval = 0; + } + break; + default: + printk_err("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); + break; + } + + return retval; +} + +int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp, + unsigned long *esp, unsigned long *ebx, unsigned long *edx, + unsigned long *ecx, unsigned long *eax, unsigned long *flags) +{ + int res=-1; + printk_debug("handleint21, eax 0x%x\n", *eax); + switch(*eax&0xffff) + { + case 0x5f19: + break; + case 0x5f18: + *eax=0x5f; + *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory + *ecx=0x060; + res=0; + break; + case 0x5f00: + *eax = 0x8600; + break; + case 0x5f01: + *eax = 0x5f; + *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + *eax=0x5f; + *ebx= (*ebx & 0xffff0000) | 2; + *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only + *edx= (*edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + *eax=0x860f; + break; + case 0xBEA7: + *eax=33; + break; + case 0xBEA4: + *eax=333; + break; + } + return res; +} |