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/* $OpenBSD: viper.h,v 1.7 2021/03/11 11:16:56 jsg Exp $ */
/*
* Copyright (c) 1991,1994 The University of Utah and
* the Computer Systems Laboratory (CSL). All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Utah $Hdr: viper.h 1.8 94/12/14$
*/
/*
* Viper control register.
*
* With respect to arbitration preference (*_prf), only one of these may be
* set at any one time. "preference" means that a particular device will
* be granted the bus on every other arbitration cycle; these bits default
* to unset (0). Similarly, a device may be denied the bus (*_den); these
* bits default to *set* (1).
*
* The macros V_CTRL_ANYPRF or V_CTRL_ANYDEN should be used to determine
* if any preference or deny bits are set.
*/
#define VI_CTRL_EISA_DEN 0x00000001 /* EISA denied bus grants */
#define VI_CTRL_EISA_PRF 0x00000002 /* EISA bus has arbitration preference */
#define VI_CTRL_CORE_DEN 0x00000004 /* CORE denied bus grants */
#define VI_CTRL_CORE_PRF 0x00000008 /* CORE bus has arbitration preference */
#define VI_CTRL_SGC0_DEN 0x00000010 /* SGC0 denied bus grants */
#define VI_CTRL_SGC0_PRF 0x00000020 /* SGC0 has arbitration preference */
#define VI_CTRL_SGC1_DEN 0x00000040 /* SGC1 denied bus grants */
#define VI_CTRL_SGC1_PRF 0x00000080 /* SGC1 has arbitration preference */
#define VI_CTRL_CPU_PRF 0x00000200 /* CPU has arbitration preference */
#define VI_CTRL_LPMC_EN 0x00010000 /* enable Low Priority Machine Checks */
#define VI_CTRL_IPREF_EN 0x00020000 /* enable instruction prefetching */
#define VI_CTRL_VSC_TOUT 0xfff80000 /* VSC clocks to wait before buserr tmo */
#define VI_CTRL_ANYPRF 0x02AA
#define VI_CTRL_ANYDEN 0x0055
#define VI_CTRL PAGE0->pz_Pdep.pd_Viper.v_Ctrlcpy
#define VI_CTRL_BITS "\020\001eisa_den\002eisa_prf\003core_den\004core_prf" \
"\005sgc1_den\006sgc1_prf\007sgc0_den\010sgc0_prf" \
"\012cpu_prf\021lpmc_en\022ipref_en"
#define VI_STAT_BITS "\020\001grf_buserr\002cpu_buserr\003ven_tmo" \
"\004ven_buserr\005toc\006hardecc\007softecc\010cmdrst"
struct vi_stat { /* (RO) */
u_int hw_rev :24, /* Viper hardware revision (24 bits!) */
cmdreset: 1, /* set if last chip reset caused by CMD_RESET */
softecc : 1, /* correctable memory error (lpmc_en set) */
hardecc : 1, /* uncorrectable memory error (HPMC) */
toc : 1, /* Transfer Of Control signaled */
vn_ader : 1, /* Venom address error (lpmc_en set) */
vn_vscto: 1, /* Venom VSC timeout (lpmc_en set) */
cpu_ader: 1, /* CPU address error or timeout (HPMC) */
grf_ader: 1; /* Graphics address error */
};
/*
* Viper TRS. The structures have been defined above; the remaining
* fields are described here.
*
* vi_intrwd (WO)
* If a high to low transition of the interrupt line occurs,
* Viper will send this to the CPU to be or'd into its EIR.
* In general, this is an ASP interrupt request.
*
* vi_mem_ctrl (WO)
* Set various DRAM attributes (row, cols, refresh, etc).
*
* vi_mem_wrchk (WO), vi_mem_rdchk (RO)
* read/write data to be for copyin/memtest.
*
* vi_mem_limit (WO)
* Set an upper limit for non-IO memory accesses; this must
* be less than the actual memory size, low 22 bits ignored.
*
* vi_merr_w0, vi_merr_w1, vi_merr_ckbyte, vi_merr_addr (RO)
* If memory error detection enabled and soft/hard ECC error,
* raw double word is stored here (w0: most significant word).
* The raw checkbyte data is stored in "vi_merr_ckbyte".
* The address of last logged error is in "vi_merr_addr".
*
*/
struct vi_trs {
u_int vi_control; /* PAGE0->pz_Pdep.pd_Viper.v_Ctrlcpy */
struct vi_stat vi_status;
u_int vi_intrwd;
u_int vi_resv1[13];
u_int vi_mem_ctrl;
u_int vi_mem_wrchk;
u_int vi_mem_limit;
u_int vi_resv2[1];
u_int vi_merr_w1;
u_int vi_merr_w2;
u_int vi_merr_ckbyte;
u_int vi_mem_rdchk;
u_int vi_merr_addr;
u_int vi_resv3[135];
};
/*
** Viper also creates HPA registers for the graphics accelerator (Venom).
** Venom has two sets of resisters; the User HPA contains registers that
** users are allowed to access, while the Supervisor HPA is only accessible
** by code running at the most privileged level. Both sets of registers
** are defined below.
*/
#define VENOM_USER ((struct vn_user *)0xFFFBC000)
#define VENOM_SUPR ((struct vn_supr *)0xFFFBD000)
/*
* Define bits in the Venom "User Control" register.
*/
struct vnu_ctl {
u_int sdt_msk :16, /* screen door transparency mask */
: 6,
d_z_intp: 1, /* disable Z Interpolation when set */
d_c_intp: 1, /* disable Color Interpolation when set */
d_ad_inc: 1, /* disable I/O Addr Incrementing when set */
: 1,
z_fast : 1, /* enable Fast Z Interpolation when set */
c_pseudo: 1, /* enable Pseudo Color when set (disable RG) */
z_prec24: 1, /* enable 24-bit Z integer precision (o/w 16) */
cmp_intp: 3; /* enable cond: Z intp owrites old Z (<,>,=) */
};
/*
* When vnu_ctl's "z_prec24" is set, 24-bit Z integer precision is enabled
* (otherwise 16-bit integer precision is used). When enabled, the format
* of various User Control registers is changed; `vnu_prec' (defined below)
* should make this format more clear.
*/
union vnu_prec { /* 16 or 24 bit precision */
struct {
u_int zero1; /* must be zero */
u_int intg :16, /* integer part (16 bits) */
frac :12, /* fractional part (12 bits) */
zero2 : 4; /* must be zero */
} prec16;
struct {
u_int frac_lo : 4, /* fractional part (lower 4 bits) */
zero1 :28; /* must be zero */
u_int intg :24, /* integer part (24 bits) */
frac_hi : 8; /* fractional part (upper 8 bits) */
} prec24;
};
#define vnu_p16i prec16.intg
#define vnu_p16f prec16.frac
#define vnu_p24i prec24.intg
#define vnu_p24f ((prec24.frac_hi << 4) | prec24.frac_lo)
#define vnu_p24fh prec24.frac_hi
#define vnu_p24fl prec24.frac_lo
/*
* Venom User HPA registers.
*/
struct vn_user {
u_int vnu_resv1[32];
struct vnu_ctl vnu_uctl; /* user control */
u_int vnu_spancnt; /* span count (13 bits, signed) */
u_int vnu_graddr; /* graphics address (24 bits: 6-29) */
u_int vnu_resv2;
union vnu_prec vnu_zslope; /* Z Slope */
union vnu_prec vnu_z; /* Z */
u_int vnu_resv3[8];
u_int vnu_bslope; /* Blue Slope (12-19:int, 20-31:fra) */
u_int vnu_bcolor; /* Blue Color (12-19:int, 20-31:fra) */
u_int vnu_resv4[2];
u_int vnu_rslope; /* Red Slope (12-19:int, 20-31:fra) */
u_int vnu_rcolor; /* Red Color (12-19:int, 20-31:fra) */
u_int vnu_resv5[2];
u_int vnu_gslope; /* Green Slope (12-19:int, 20-31:fra) */
u_int vnu_gcolor; /* Green Color (12-19:int, 20-31:fra) */
};
/*
* Define bits in Venom "Supervisor Control" register.
*/
struct vns_ctl {
u_int : 4,
ioaddr : 2, /* graphics addr (bits 4 & 5 of `vnu_graddr') */
d_venom : 1, /* disable Venom operation processing */
:25;
};
/*
* Venom Supervisor HPA registers.
*/
struct vn_supr {
u_int vns_resv1[32];
struct vns_ctl vns_sctl; /* supervisor control */
u_int vns_zaddr; /* Z Buffer Address (RO) */
};
void viper_setintrwnd(u_int32_t mask);
void viper_eisa_en(void);
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