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freebsd-skq/sys/arm/include/physmem.h

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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.
2014-02-08 23:54:16 +00:00
/*-
* Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_PHYSMEM_H_
#define _MACHINE_PHYSMEM_H_
It turns out a global variable is the only straightforward way to communicate the kernel's physical load address from where it's known in initarm() into cpu_mp_start() which is called from non-arm code and takes no parameters. This adds the global variable and ensures that all the various copies of initarm() set it. It uses the variable in cpu_mp_start(), eliminating the last uses of KERNPHYSADDR outside of locore.S (where we can now calculate it instead of relying on the constant).
2014-02-09 02:39:00 +00:00
/*
* The physical address at which the kernel was loaded.
*/
Use vm_paddr_t, not vm_offset_t, when dealing with physical addresses. Pointed out by: alc
2014-02-09 14:35:44 +00:00
extern vm_paddr_t arm_physmem_kernaddr;
It turns out a global variable is the only straightforward way to communicate the kernel's physical load address from where it's known in initarm() into cpu_mp_start() which is called from non-arm code and takes no parameters. This adds the global variable and ensures that all the various copies of initarm() set it. It uses the variable in cpu_mp_start(), eliminating the last uses of KERNPHYSADDR outside of locore.S (where we can now calculate it instead of relying on the constant).
2014-02-09 02:39:00 +00:00
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.
2014-02-08 23:54:16 +00:00
/*
* Routines to help configure physical ram.
*
* Multiple regions of contiguous physical ram can be added (in any order).
*
* Multiple regions of physical ram that should be excluded from crash dumps, or
* memory allocation, or both, can be added (in any order).
*
* After all early kernel init is done and it's time to configure all
* remainining non-excluded physical ram for use by other parts of the kernel,
* arm_physmem_init_kernel_globals() processes the hardware regions and
* exclusion regions to generate the global dump_avail and phys_avail arrays
* that communicate physical ram configuration to other parts of the kernel.
*/
#define EXFLAG_NODUMP 0x01
#define EXFLAG_NOALLOC 0x02
Use vm_paddr_t, not vm_offset_t, when dealing with physical addresses. Pointed out by: alc
2014-02-09 14:35:44 +00:00
void arm_physmem_hardware_region(vm_paddr_t pa, vm_size_t sz);
void arm_physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags);
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.
2014-02-08 23:54:16 +00:00
void arm_physmem_init_kernel_globals(void);
void arm_physmem_print_tables(void);
/*
* Convenience routines for FDT.
*/
#ifdef FDT
#include <machine/ofw_machdep.h>
Give the fdt helper routines static linkage since no global definition of them is provided anywhere. (gcc was nice enough to warn about this, clang didn't for some reason.)
2014-02-17 20:04:57 +00:00
static inline void
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.
2014-02-08 23:54:16 +00:00
arm_physmem_hardware_regions(struct mem_region * mrptr, int mrcount)
{
while (mrcount--) {
arm_physmem_hardware_region(mrptr->mr_start, mrptr->mr_size);
++mrptr;
}
}
Give the fdt helper routines static linkage since no global definition of them is provided anywhere. (gcc was nice enough to warn about this, clang didn't for some reason.)
2014-02-17 20:04:57 +00:00
static inline void
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.
2014-02-08 23:54:16 +00:00
arm_physmem_exclude_regions(struct mem_region * mrptr, int mrcount,
uint32_t exflags)
{
while (mrcount--) {
arm_physmem_exclude_region(mrptr->mr_start, mrptr->mr_size,
exflags);
++mrptr;
}
}
#endif /* FDT */
#endif
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