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added hack to save registerprogramming for a few registers that has been done by the cardBIOS: things that we don't have coldstart support for yet. This is nessesary if the driver is started/stopped more than once per 'system boot': programming done by the VGA BIOS has a tendency to get overwritten by driver-use. In progress: accelerant doesn't use it yet. 

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16074 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2006-01-24 20:37:05 +00:00
parent eb2fc29abd
commit 17ca256d6f
1 changed files with 31 additions and 0 deletions
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31
src/add-ons/kernel/drivers/graphics/nvidia/driver.c
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@ -60,6 +60,7 @@ struct device_info {
vuint32 *regs; /* kernel's pointer to memory mapped registers */
pci_info pcii; /* a convenience copy of the pci info for this device */
char name[B_OS_NAME_LENGTH]; /* where we keep the name of the device for publishing and comparing */
bios_init bios_pre_init; /* we keep several things here we don't have coldstart support for yet. */
};
typedef struct {
@ -819,6 +820,8 @@ static void probe_devices(void) {
di->shared_area = -1;
/* mark pointer to shared data as invalid */
di->si = NULL;
/* mark one-time accelerant init flag to 'is not yet done' */
di->bios_pre_init.done = false;
/* inc pointer to device info */
di++;
/* inc count */
@ -986,6 +989,13 @@ static status_t open_hook (const char* name, uint32 flags, void** cookie) {
/* ensure that the accelerant's INIT_ACCELERANT function can be executed */
si->accelerant_in_use = false;
/* copy the results of the one-time startup processing possibly done that discovered
* BIOS pre-init programming that can't be 'recovered' once the accelerant has
* been running (it 'overwrites' numerous BIOS pre-programmed items after all...) */
/* Note: This is kind of a hack. */
si->system_start_done = di->bios_pre_init.done;
si->ps.p1_timing.flags = di->bios_pre_init.p1_timing_flags;
si->ps.p2_timing.flags = di->bios_pre_init.p2_timing_flags;
/* note the amount of system RAM the system BIOS assigned to the card if applicable:
* unified memory architecture (UMA) */
@ -1324,6 +1334,27 @@ control_hook (void* dev, uint32 msg, void *buf, size_t len) {
tmpUlong &= ~PCI_command_io;
set_pci(PCI_command, 2, tmpUlong);
/* end of critical section */
RELEASE_BEN(pd->kernel);
}
} break;
case NV_SET_BIOS_PRE_INIT: {
nv_set_bios_pre_init *bios_info = (nv_set_bios_pre_init *)buf;
if (bios_info->magic == NV_PRIVATE_DATA_MAGIC) {
/* lock the driver:
* no other graphics card may have ISA I/O enabled when we enter */
AQUIRE_BEN(pd->kernel);
/* copy the results of the one-time BIOS startup processing relayed
* to us that we depend on */
/* Note: This is kind of a hack (lack of full coldstart support). */
di->bios_pre_init.p1_timing_flags = bios_info->data.p1_timing_flags;
di->bios_pre_init.p2_timing_flags = bios_info->data.p2_timing_flags;
/* we are done */
di->bios_pre_init.done = true;
result = B_OK;
/* end of critical section */
RELEASE_BEN(pd->kernel);
}