aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/sysdev/bestcomm/sram.h
diff options
context:
space:
mode:
authorSylvain Munaut <tnt@246tNt.com>2007-09-16 20:53:27 +1000
committerGrant Likely <grant.likely@secretlab.ca>2007-10-16 17:09:34 -0600
commit2f9ea1bde0d12d8fb5a7bdc7ab6834275d456262 (patch)
treef24cbb1c117788dd8cb529bf7812f4567f962812 /arch/powerpc/sysdev/bestcomm/sram.h
parent07e6e93136ca61f071c819c69e1ec5bff9fda46f (diff)
[POWERPC] bestcomm: core bestcomm support for Freescale MPC5200
This patch adds support for the core of the BestComm API for the Freescale MPC5200(b). The BestComm engine is a microcode-controlled / tasks-based DMA used by several of the onchip devices. Setting up the tasks / memory allocation and all common low level functions are handled by this patch. The specifics details of each tasks and their microcode are split-out in separate patches. This is not the official API, but a much cleaner one. (hopefully) Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/powerpc/sysdev/bestcomm/sram.h')
-rw-r--r--arch/powerpc/sysdev/bestcomm/sram.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/bestcomm/sram.h b/arch/powerpc/sysdev/bestcomm/sram.h
new file mode 100644
index 00000000000..b6d668963cc
--- /dev/null
+++ b/arch/powerpc/sysdev/bestcomm/sram.h
@@ -0,0 +1,54 @@
+/*
+ * Handling of a sram zone for bestcomm
+ *
+ *
+ * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef __BESTCOMM_SRAM_H__
+#define __BESTCOMM_SRAM_H__
+
+#include <asm/rheap.h>
+#include <asm/mmu.h>
+#include <linux/spinlock.h>
+
+
+/* Structure used internally */
+ /* The internals are here for the inline functions
+ * sake, certainly not for the user to mess with !
+ */
+struct bcom_sram {
+ phys_addr_t base_phys;
+ void *base_virt;
+ unsigned int size;
+ rh_info_t *rh;
+ spinlock_t lock;
+};
+
+extern struct bcom_sram *bcom_sram;
+
+
+/* Public API */
+extern int bcom_sram_init(struct device_node *sram_node, char *owner);
+extern void bcom_sram_cleanup(void);
+
+extern void* bcom_sram_alloc(int size, int align, phys_addr_t *phys);
+extern void bcom_sram_free(void *ptr);
+
+static inline phys_addr_t bcom_sram_va2pa(void *va) {
+ return bcom_sram->base_phys +
+ (unsigned long)(va - bcom_sram->base_virt);
+}
+
+static inline void *bcom_sram_pa2va(phys_addr_t pa) {
+ return bcom_sram->base_virt +
+ (unsigned long)(pa - bcom_sram->base_phys);
+}
+
+
+#endif /* __BESTCOMM_SRAM_H__ */
+