Differential D17183 Diff 48420 head/sys/powerpc/ofw/ofw_machdep.c

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head/sys/powerpc/ofw/ofw_machdep.c

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#include <machine/cpu.h>		#include <machine/cpu.h>
#include <machine/md_var.h>		#include <machine/md_var.h>
#include <machine/platform.h>		#include <machine/platform.h>
#include <machine/ofw_machdep.h>		#include <machine/ofw_machdep.h>
#include <machine/trap.h>		#include <machine/trap.h>

#include <contrib/libfdt/libfdt.h>		#include <contrib/libfdt/libfdt.h>

		#ifdef POWERNV
		#include <powerpc/powernv/opal.h>
		#endif

static void *fdt;		static void *fdt;
int ofw_real_mode;		int ofw_real_mode;

#ifdef AIM		#ifdef AIM
extern register_t ofmsr[5];		extern register_t ofmsr[5];
extern void *openfirmware_entry;		extern void *openfirmware_entry;
char save_trap_init[0x2f00]; /* EXC_LAST */		char save_trap_init[0x2f00]; /* EXC_LAST */
char save_trap_of[0x2f00]; /* EXC_LAST */		char save_trap_of[0x2f00]; /* EXC_LAST */
▲ Show 20 Lines • Show All 253 Lines • ▼ Show 20 Lines	excise_initrd_region(struct mem_region *avail, int asz)
initrdmap[0].mr_start = start;		initrdmap[0].mr_start = start;
initrdmap[0].mr_size = end - start;		initrdmap[0].mr_size = end - start;

asz = excise_reserved_regions(avail, asz, initrdmap, 1);		asz = excise_reserved_regions(avail, asz, initrdmap, 1);

return (asz);		return (asz);
}		}

		#ifdef POWERNV
static int		static int
		excise_msi_region(struct mem_region *avail, int asz)
		{
		uint64_t start, end;
		struct mem_region initrdmap[1];

		/*
		* This range of physical addresses is used to implement optimized
		* 32 bit MSI interrupts on POWER9. Exclude it to avoid accidentally
		* using it for DMA, as this will cause an immediate PHB fence.
		* While we could theoretically turn off this behavior in the ETU,
		* doing so would break 32-bit MSI, so just reserve the range in
		* the physical map instead.
		* See section 4.4.2.8 of the PHB4 specification.
		*/
		start = 0x00000000ffff0000ul;
		end = 0x00000000fffffffful;

		initrdmap[0].mr_start = start;
		initrdmap[0].mr_size = end - start;

		asz = excise_reserved_regions(avail, asz, initrdmap, 1);

		return (asz);
		}
		#endif

		static int
excise_fdt_reserved(struct mem_region *avail, int asz)		excise_fdt_reserved(struct mem_region *avail, int asz)
{		{
struct mem_region fdtmap[32];		struct mem_region fdtmap[32];
ssize_t fdtmapsize;		ssize_t fdtmapsize;
phandle_t chosen;		phandle_t chosen;
int j, fdtentries;		int j, fdtentries;

chosen = OF_finddevice("/chosen");		chosen = OF_finddevice("/chosen");
▲ Show 20 Lines • Show All 73 Lines • ▼ Show 20 Lines	if (OF_hasprop(phandle, "fdtmemreserv"))
asz = excise_fdt_reserved(availp, asz);		asz = excise_fdt_reserved(availp, asz);

/* If the kernel is being loaded through kexec, initrd region is listed		/* If the kernel is being loaded through kexec, initrd region is listed
* in /chosen but the region is not marked as reserved, so, we might exclude		* in /chosen but the region is not marked as reserved, so, we might exclude
* it here.		* it here.
*/		*/
if (OF_hasprop(phandle, "linux,initrd-start"))		if (OF_hasprop(phandle, "linux,initrd-start"))
asz = excise_initrd_region(availp, asz);		asz = excise_initrd_region(availp, asz);
		#endif

		#ifdef POWERNV
		if (opal_check() == 0)
		asz = excise_msi_region(availp, asz);
#endif		#endif

*memsz = msz;		*memsz = msz;
*availsz = asz;		*availsz = asz;
}		}

void		void
OF_initial_setup(void fdt_ptr, void junk, int (openfirm)(void ))		OF_initial_setup(void fdt_ptr, void junk, int (openfirm)(void ))
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