C++ (Cpp) pvr_pat_entry Examples

Example #1

File: mutils.c Project: GREYFOXRGR/BPI-M3-bsp

static IMG_VOID
PVRLinuxX86PATProbe(IMG_VOID)
{
	/*
	 * cpu_has_pat indicates whether PAT support is available on the CPU,
	 * but doesn't indicate if it has been enabled.
	 */
	if (cpu_has_pat)	/* PRQA S 3335 */ /* ignore 'no function declared' */
	{
		u64 pat;
		IMG_UINT pat_index;
		IMG_UINT pat_entry;

		PVR_TRACE(("%s: PAT available", __FUNCTION__));
		/*
		 * There is no Linux API for finding out if write combining
		 * is avaialable through the PAT, so we take the direct
		 * approach, and see if the PAT MSR contains a write combining
		 * entry.
		 */
		rdmsrl(MSR_IA32_CR_PAT, pat);
		PVR_TRACE(("%s: Top 32 bits of PAT: 0x%.8x", __FUNCTION__, (IMG_UINT)(pat >> 32)));
		PVR_TRACE(("%s: Bottom 32 bits of PAT: 0x%.8x", __FUNCTION__, (IMG_UINT)(pat)));

		pat_index = pvr_pat_index(_PAGE_CACHE_WC);
		PVR_TRACE(("%s: PAT index for write combining: %u", __FUNCTION__, pat_index));

		pat_entry = pvr_pat_entry(pat, pat_index);
		PVR_TRACE(("%s: PAT entry for write combining: 0x%.2x (should be 0x%.2x)", __FUNCTION__, pat_entry, PAT_LINUX_X86_WC));

#if defined(SUPPORT_LINUX_X86_WRITECOMBINE)
		g_write_combining_available = (IMG_BOOL)(pat_entry == PAT_LINUX_X86_WC);
#endif
	}
#if defined(DEBUG)
#if defined(SUPPORT_LINUX_X86_WRITECOMBINE)
	if (g_write_combining_available)
	{
		PVR_TRACE(("%s: Write combining available via PAT", __FUNCTION__));
	}
	else
	{
		PVR_TRACE(("%s: Write combining not available", __FUNCTION__));
	}
#else	/* defined(SUPPORT_LINUX_X86_WRITECOMBINE) */
	PVR_TRACE(("%s: Write combining disabled in driver build", __FUNCTION__));
#endif	/* defined(SUPPORT_LINUX_X86_WRITECOMBINE) */
#endif	/* DEBUG */
}

Example #2

static IMG_VOID
PVRLinuxX86PATProbe(IMG_VOID)
{

	if (cpu_has_pat)
	{
		u64 pat;
		IMG_UINT pat_index;
		IMG_UINT pat_entry;

		PVR_TRACE(("%s: PAT available", __FUNCTION__));

		rdmsrl(MSR_IA32_CR_PAT, pat);
		PVR_TRACE(("%s: Top 32 bits of PAT: 0x%.8x", __FUNCTION__, (IMG_UINT)(pat >> 32)));
		PVR_TRACE(("%s: Bottom 32 bits of PAT: 0x%.8x", __FUNCTION__, (IMG_UINT)(pat)));

		pat_index = pvr_pat_index(_PAGE_CACHE_WC);
		PVR_TRACE(("%s: PAT index for write combining: %u", __FUNCTION__, pat_index));

		pat_entry = pvr_pat_entry(pat, pat_index);
		PVR_TRACE(("%s: PAT entry for write combining: 0x%.2x (should be 0x%.2x)", __FUNCTION__, pat_entry, PAT_LINUX_X86_WC));

#if defined(SUPPORT_LINUX_X86_WRITECOMBINE)
		g_write_combining_available = (IMG_BOOL)(pat_entry == PAT_LINUX_X86_WC);
#endif
	}
#if defined(DEBUG)
#if defined(SUPPORT_LINUX_X86_WRITECOMBINE)
	if (g_write_combining_available)
	{
		PVR_TRACE(("%s: Write combining available via PAT", __FUNCTION__));
	}
	else
	{
		PVR_TRACE(("%s: Write combining not available", __FUNCTION__));
	}
#else
	PVR_TRACE(("%s: Write combining disabled in driver build", __FUNCTION__));
#endif
#endif
}