Consolidate code related to setting up physical memory configuration into

a new physmem.c file.  The new code provides helper routines that can be
used by legacy SoCs and newer FDT-based systems.  There are routines to
add one or more regions of physically contiguous ram, and exclude one or
more physically contiguous regions of ram.  Ram can be excluded from crash
dumps, from being given over to the vm system for allocation management,
or both.  After all the included and excluded regions have been added,
arm_physmem_init_kernel_globals() processes the regions into the global
dump_avail and phys_avail arrays and realmem and physmem variables that
communicate memory configuration to the rest of the kernel.

Convert all existing SoCs to use the new helper code.

1 files changed, 16 insertions, 14 deletions

diff --git a/sys/arm/at91/at91_machdep.c b/sys/arm/at91/at91_machdep.c
index 9e73d0c..d9d26d8 100644
--- a/sys/arm/at91/at91_machdep.c
+++ b/sys/arm/at91/at91_machdep.c
@@ -68,6 +68,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/exec.h>
 #include <sys/kdb.h>
 #include <sys/msgbuf.h>
+#include <machine/physmem.h>
 #include <machine/reg.h>
 #include <machine/cpu.h>
 #include <machine/board.h>
@@ -199,9 +200,6 @@ const struct arm_devmap_entry at91_devmap[] = {
 
 /* Physical and virtual addresses for some global pages */
 
-vm_paddr_t phys_avail[10];
-vm_paddr_t dump_avail[4];
-
 struct pv_addr systempage;
 struct pv_addr msgbufpv;
 struct pv_addr irqstack;
@@ -630,8 +628,6 @@ initarm(struct arm_boot_params *abp)
 	arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
 
 	pmap_curmaxkvaddr = afterkern + L1_S_SIZE * (KERNEL_PT_KERN_NUM - 1);
-	arm_dump_avail_init(abp->abp_physaddr, memsize,
-	    sizeof(dump_avail)/sizeof(dump_avail[0]));
 	/* Always use the 256MB of KVA we have available between the kernel and devices */
 	vm_max_kernel_address = KERNVIRTADDR + (256 << 20);
 	pmap_bootstrap(freemempos, &kernel_l1pt);
@@ -639,15 +635,21 @@ initarm(struct arm_boot_params *abp)
 	msgbufinit(msgbufp, msgbufsize);
 	mutex_init();
 
-	i = 0;
-#if PHYSADDR != KERNPHYSADDR
-	phys_avail[i++] = PHYSADDR;
-	phys_avail[i++] = KERNPHYSADDR;
-#endif
-	phys_avail[i++] = virtual_avail - KERNVIRTADDR + KERNPHYSADDR;
-	phys_avail[i++] = PHYSADDR + memsize;
-	phys_avail[i++] = 0;
-	phys_avail[i++] = 0;
+	/*
+	 * Add the physical ram we have available.
+	 *
+	 * Exclude the kernel, and all the things we allocated which immediately
+	 * follow the kernel, from the VM allocation pool but not from crash
+	 * dumps.  virtual_avail is a global variable which tracks the kva we've
+	 * "allocated" while setting up pmaps.
+	 *
+	 * Prepare the list of physical memory available to the vm subsystem.
+	 */
+	arm_physmem_hardware_region(PHYSADDR, memsize);
+	arm_physmem_exclude_region(abp->abp_physaddr, 
+	    virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC);
+	arm_physmem_init_kernel_globals();
+
 	init_param2(physmem);
 	kdb_init();
 	return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -