Date: Sun, 14 Dec 2003 08:29:13 +1100 From: John Birrell <jb@cimlogic.com.au> To: Danny Braniss <danny@cs.huji.ac.il> Cc: Freebsd Current <current@freebsd.org> Subject: Re: SC520 and reboot Message-ID: <20031214082913.A2027@freebsd3.cimlogic.com.au> In-Reply-To: <E1AVCVw-0003fu-W2@cs.huji.ac.il>; from danny@cs.huji.ac.il on Sat, Dec 13, 2003 at 06:21:08PM %2B0200 References: <E1AVCVw-0003fu-W2@cs.huji.ac.il>
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On Sat, Dec 13, 2003 at 06:21:08PM +0200, Danny Braniss wrote:
> this Elan based board is now running 5.2-CURRENT, but typing
> reboot, causes the machine to stop, the leds to go off, and after power
> cycle, the bios setup is cleared!
> this does not happen if i do a shutdown, then a power cycle, freebsd
> boots nicely.
My Compulab board doesn't reset the bios. Reboot (or shutdown -r) on FreeBSD
causes the board to power down, not reboot. The documented way to cause a
reboot with the Elan SC520 chip is to set SYS_RST in the MMCR.
In sys/i386/i386/machdep.c:cpu_reset_real() I've added:
#ifdef CPU_ELAN
if (elan_mmcr != NULL)
/* SYS_RST */
elan_mmcr->RESCFG = 1;
#endif
This causes the reboot to behave normally.
For convenience, I use the following structure to access the Elan SC520
memory mapped configuration region instead of the opaque uint16_t array
that phk uses. This changes lines like:
elan_mmcr[0xc82 / 2] = 0xc001;
to
elan_mmcr->GPTMR2CTL = 0xc001;
which is more intuitive to me when reading the AMD register set manual.
/*
* AMD Elan SC520 Memory Mapped Configuration Region (MMCR).
*
* The layout of this structure is documented by AMD in the Elan SC520
* Microcontroller Register Set Manual. The field names match those
* described in that document. The overall structure size must be 4096
* bytes. Ignore fields with the 'pad' prefix - they are only present for
* alignment purposes.
*/
struct elan_mmcr {
/* CPU */
u_int16_t REVID;
u_int8_t CPUCTL;
u_int8_t pad_0x003[0xd];
/* SDRAM Controller */
u_int16_t DRCCTL;
u_int16_t DRCTMCTL;
u_int16_t DRCCFG;
u_int16_t DRCBENDADR;
u_int8_t pad_0x01a[0x6];
u_int8_t ECCCTL;
u_int8_t ECCSTA;
u_int8_t ECCCKBPOS;
u_int8_t ECCCKTEST;
u_int32_t ECCSBADD;
u_int32_t ECCMBADD;
u_int8_t pad_0x02c[0x14];
/* SDRAM Buffer */
u_int8_t DBCTL;
u_int8_t pad_0x041[0xf];
/* ROM/Flash Controller */
u_int16_t BOOTCSCTL;
u_int8_t pad_0x052[0x2];
u_int16_t ROMCS1CTL;
u_int16_t ROMCS2CTL;
u_int8_t pad_0x058[0x8];
/* PCI Bus Host Bridge */
u_int16_t HBCTL;
u_int16_t HBTGTIRQCTL;
u_int16_t HBTGTIRQSTA;
u_int16_t HBMSTIRQCTL;
u_int16_t HBMSTIRQSTA;
u_int8_t pad_0x06a[0x2];
u_int32_t MSTINTADD;
/* System Arbitration */
u_int8_t SYSARBCTL;
u_int8_t PCIARBSTA;
u_int16_t SYSARBMENB;
u_int32_t ARBPRICTL;
u_int8_t pad_0x078[0x8];
/* System Address Mapping */
u_int32_t ADDDECCTL;
u_int32_t WPVSTA;
u_int32_t PAR0;
u_int32_t PAR1;
u_int32_t PAR2;
u_int32_t PAR3;
u_int32_t PAR4;
u_int32_t PAR5;
u_int32_t PAR6;
u_int32_t PAR7;
u_int32_t PAR8;
u_int32_t PAR9;
u_int32_t PAR10;
u_int32_t PAR11;
u_int32_t PAR12;
u_int32_t PAR13;
u_int32_t PAR14;
u_int32_t PAR15;
u_int8_t pad_0x0c8[0xb38];
/* GP Bus Controller */
u_int8_t GPECHO;
u_int8_t GPCSDW;
u_int16_t GPCSQUAL;
u_int8_t pad_0xc04[0x4];
u_int8_t GPCSRT;
u_int8_t GPCSPW;
u_int8_t GPCSOFF;
u_int8_t GPRDW;
u_int8_t GPRDOFF;
u_int8_t GPWRW;
u_int8_t GPWROFF;
u_int8_t GPALEW;
u_int8_t GPALEOFF;
u_int8_t pad_0xc11[0xf];
/* Programmable Input/Output */
u_int16_t PIOPFS15_0;
u_int16_t PIOPFS31_16;
u_int8_t CSPFS;
u_int8_t pad_0xc25;
u_int8_t CLKSEL;
u_int8_t pad_0xc27;
u_int16_t DSCTL;
u_int16_t PIODIR15_0;
u_int16_t PIODIR31_16;
u_int8_t pad_0xc2e[0x2];
u_int16_t PIODATA15_0;
u_int16_t PIODATA31_16;
u_int16_t PIOSET15_0;
u_int16_t PIOSET31_16;
u_int16_t PIOCLR15_0;
u_int16_t PIOCLR31_16;
u_int8_t pad_0xc3c[0x24];
/* Software Timer */
u_int16_t SWTMRMILLI;
u_int16_t SWTMRMICRO;
u_int8_t SWTMRCFG;
u_int8_t pad_0xc65[0xb];
/* General-Purpose Timers */
u_int8_t GPTMRSTA;
u_int8_t pad_0xc71;
u_int16_t GPTMR0CTL;
u_int16_t GPTMR0CNT;
u_int16_t GPTMR0MAXCMPA;
u_int16_t GPTMR0MAXCMPB;
u_int16_t GPTMR1CTL;
u_int16_t GPTMR1CNT;
u_int16_t GPTMR1MAXCMPA;
u_int16_t GPTMR1MAXCMPB;
u_int16_t GPTMR2CTL;
u_int16_t GPTMR2CNT;
u_int8_t pad_0xc86[0x8];
u_int16_t GPTMR2MAXCMPA;
u_int8_t pad_0xc90[0x20];
/* Watchdog Timer */
u_int16_t WDTMRCTL;
u_int16_t WDTMRCNTL;
u_int16_t WDTMRCNTH;
u_int8_t pad_0xcb6[0xa];
/* UART Serial Ports */
u_int8_t UART1CTL;
u_int8_t UART1STA;
u_int8_t UART1FCRSHAD;
u_int8_t pad_0xcc3;
u_int8_t UART2CTL;
u_int8_t UART2STA;
u_int8_t UART2FCRSHAD;
u_int8_t pad_0xcc7[0x9];
/* Synchronous Serial Interface */
u_int8_t SSICTL;
u_int8_t SSIXMIT;
u_int8_t SSICMD;
u_int8_t SSISTA;
u_int8_t SSIRCV;
u_int8_t pad_0xcd5[0x2b];
/* Programmable Interrupt Controller */
u_int8_t PICICR;
u_int8_t pad_0xd01;
u_int8_t MPICMODE;
u_int8_t SL1PICMODE;
u_int8_t SL2PICMODE;
u_int8_t pad_0xd05[0x3];
u_int16_t SWINT16_1;
u_int8_t SWINT22_17;
u_int8_t pad_0xd0b[0x5];
u_int16_t INTPINPOL;
u_int8_t pad_0xd12[0x2];
u_int16_t PCIHOSTMAP;
u_int8_t pad_0xd16[0x2];
u_int16_t ECCMAP;
u_int8_t GPTMR0MAP;
u_int8_t GPTMR1MAP;
u_int8_t GPTMR2MAP;
u_int8_t pad_0xd1d[0x3];
u_int8_t PIT0MAP;
u_int8_t PIT1MAP;
u_int8_t PIT2MAP;
u_int8_t pad_0xd23[0x5];
u_int8_t UART1MAP;
u_int8_t UART2MAP;
u_int8_t pad_0xd2a[0x6];
u_int8_t PCIINTAMAP;
u_int8_t PCIINTBMAP;
u_int8_t PCIINTCMAP;
u_int8_t PCIINTDMAP;
u_int8_t pad_0xd34[0xc];
u_int8_t DMABCINTMAP;
u_int8_t SSIMAP;
u_int8_t WDTMAP;
u_int8_t RTCMAP;
u_int8_t WPVMAP;
u_int8_t ICEMAP;
u_int8_t FERRMAP;
u_int8_t pad_0xd47[0x9];
u_int8_t GP0IMAP;
u_int8_t GP1IMAP;
u_int8_t GP2IMAP;
u_int8_t GP3IMAP;
u_int8_t GP4IMAP;
u_int8_t GP5IMAP;
u_int8_t GP6IMAP;
u_int8_t GP7IMAP;
u_int8_t GP8IMAP;
u_int8_t GP9IMAP;
u_int8_t GP10IMAP;
u_int8_t pad_0xd5b[0x15];
/* Reset Generation */
u_int8_t SYSINFO;
u_int8_t pad_0xd71;
u_int8_t RESCFG;
u_int8_t pad_0xd73;
u_int8_t RESSTA;
u_int8_t pad_0xd75[0xb];
/* GP DMA Controller */
u_int8_t GPDMACTL;
u_int8_t GPDMAMMIO;
u_int16_t GPDMAEXTCHMAPA;
u_int16_t GPDMAEXTCHMAPB;
u_int8_t GPDMAEXTPG0;
u_int8_t GPDMAEXTPG1;
u_int8_t GPDMAEXTPG2;
u_int8_t GPDMAEXTPG3;
u_int8_t GPDMAEXTPG5;
u_int8_t GPDMAEXTPG6;
u_int8_t GPDMAEXTPG7;
u_int8_t pad_0xd8d[0x3];
u_int8_t GPDMAEXTTC3;
u_int8_t GPDMAEXTTC5;
u_int8_t GPDMAEXTTC6;
u_int8_t GPDMAEXTTC7;
u_int8_t pad_0xd94[0x4];
u_int8_t GPDMABCCTL;
u_int8_t GPDMABCSTA;
u_int8_t GPDMABSINTENB;
u_int8_t GPDMABCVAL;
u_int8_t pad_0xd9c[0x4];
u_int16_t GPDMANXTADDL3;
u_int16_t GPDMANXTADDH3;
u_int16_t GPDMANXTADDL5;
u_int16_t GPDMANXTADDH5;
u_int16_t GPDMANXTADDL6;
u_int16_t GPDMANXTADDH6;
u_int16_t GPDMANXTADDL7;
u_int16_t GPDMANXTADDH7;
u_int16_t GPDMANXTTCL3;
u_int8_t GPDMANXTTCH3;
u_int8_t pad_0xdb3;
u_int16_t GPDMANXTTCL5;
u_int8_t GPDMANXTTCH5;
u_int8_t pad_0xdb7;
u_int16_t GPDMANXTTCL6;
u_int8_t GPDMANXTTCH6;
u_int8_t pad_0xdbb;
u_int16_t GPDMANXTTCL7;
u_int8_t GPDMANXTTCH7;
u_int8_t pad_0xdc0[0x240];
};
extern struct elan_mmcr *elan_mmcr;
--
John Birrell
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