mirror of
https://github.com/AsahiLinux/u-boot
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40599239e7
Calculating the clocks requires a bit of calls to gcc math functions, so cache the values after the first run since they'll most likely never change once U-Boot is up and running. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
217 lines
5.1 KiB
C
217 lines
5.1 KiB
C
/*
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* U-boot - blackfin_local.h
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*
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* Copyright (c) 2005-2007 Analog Devices Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef __BLACKFIN_LOCAL_H__
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#define __BLACKFIN_LOCAL_H__
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#define LO(con32) ((con32) & 0xFFFF)
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#define lo(con32) ((con32) & 0xFFFF)
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#define HI(con32) (((con32) >> 16) & 0xFFFF)
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#define hi(con32) (((con32) >> 16) & 0xFFFF)
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#define OFFSET_(x) (x & 0x0000FFFF)
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#define MK_BMSK_(x) (1 << x)
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/* Ideally this should be USEC not MSEC, but the USEC multiplication
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* likes to overflow 32bit quantities which is all our assembler
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* currently supports ;(
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*/
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#define USEC_PER_MSEC 1000
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#define MSEC_PER_SEC 1000
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#define BFIN_SCLK (100000000)
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#define SCLK_TO_MSEC(sclk) ((MSEC_PER_SEC * ((sclk) / USEC_PER_MSEC)) / (BFIN_SCLK / USEC_PER_MSEC))
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#define MSEC_TO_SCLK(msec) ((((BFIN_SCLK / USEC_PER_MSEC) * (msec)) / MSEC_PER_SEC) * USEC_PER_MSEC)
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#include <asm/linkage.h>
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#ifndef __ASSEMBLY__
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# ifdef SHARED_RESOURCES
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# include <asm/shared_resources.h>
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# endif
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# include <linux/types.h>
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extern u_long get_vco(void);
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extern u_long get_cclk(void);
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extern u_long get_sclk(void);
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# define bfin_revid() (*pCHIPID >> 28)
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extern void blackfin_icache_flush_range(const void *, const void *);
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extern void blackfin_dcache_flush_range(const void *, const void *);
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extern void blackfin_dcache_flush_invalidate_range(const void *, const void *);
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/* Use DMA to move data from on chip to external memory. While this is
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* required for only L1 instruction (it is not directly readable by the
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* core via data loads), it isn't a huge performance issue for other
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* regions (it's probably even faster than core load/stores). However,
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* the DMA engine does not have access to the L1 scratchpad, and we
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* cannot use DMA inside of the MMR space.
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*/
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# define addr_bfin_on_chip_mem(addr) \
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(((unsigned long)(addr) >= 0xef000000 && (unsigned long)addr < SYSMMR_BASE) && \
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!((unsigned long)(addr) >= L1_SRAM_SCRATCH && \
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(unsigned long)(addr) < L1_SRAM_SCRATCH_END))
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# include <asm/system.h>
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#if ANOMALY_05000198
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# define NOP_PAD_ANOMALY_05000198 "nop;"
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#else
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# define NOP_PAD_ANOMALY_05000198
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#endif
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#define bfin_read8(addr) ({ \
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uint8_t __v; \
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__asm__ __volatile__( \
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NOP_PAD_ANOMALY_05000198 \
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"%0 = b[%1] (z);" \
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: "=d" (__v) \
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: "a" (addr) \
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); \
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__v; })
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#define bfin_read16(addr) ({ \
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uint16_t __v; \
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__asm__ __volatile__( \
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NOP_PAD_ANOMALY_05000198 \
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"%0 = w[%1] (z);" \
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: "=d" (__v) \
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: "a" (addr) \
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); \
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__v; })
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#define bfin_read32(addr) ({ \
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uint32_t __v; \
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__asm__ __volatile__( \
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NOP_PAD_ANOMALY_05000198 \
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"%0 = [%1];" \
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: "=d" (__v) \
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: "a" (addr) \
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); \
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__v; })
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#define bfin_readPTR(addr) bfin_read32(addr)
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#define bfin_write8(addr, val) \
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__asm__ __volatile__( \
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NOP_PAD_ANOMALY_05000198 \
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"b[%0] = %1;" \
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: \
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: "a" (addr), "d" (val) \
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: "memory" \
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)
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#define bfin_write16(addr, val) \
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__asm__ __volatile__( \
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NOP_PAD_ANOMALY_05000198 \
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"w[%0] = %1;" \
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: \
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: "a" (addr), "d" (val) \
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: "memory" \
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)
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#define bfin_write32(addr, val) \
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__asm__ __volatile__( \
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NOP_PAD_ANOMALY_05000198 \
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"[%0] = %1;" \
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: \
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: "a" (addr), "d" (val) \
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: "memory" \
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)
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#define bfin_writePTR(addr, val) bfin_write32(addr, val)
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/* SSYNC implementation for C file */
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static inline void SSYNC(void)
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{
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int _tmp;
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if (ANOMALY_05000312)
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__asm__ __volatile__(
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"cli %0;"
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"nop;"
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"nop;"
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"ssync;"
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"sti %0;"
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: "=d" (_tmp)
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);
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else if (ANOMALY_05000244)
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__asm__ __volatile__(
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"nop;"
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"nop;"
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"nop;"
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"ssync;"
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);
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else
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__asm__ __volatile__("ssync;");
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}
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/* CSYNC implementation for C file */
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static inline void CSYNC(void)
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{
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int _tmp;
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if (ANOMALY_05000312)
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__asm__ __volatile__(
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"cli %0;"
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"nop;"
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"nop;"
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"csync;"
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"sti %0;"
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: "=d" (_tmp)
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);
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else if (ANOMALY_05000244)
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__asm__ __volatile__(
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"nop;"
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"nop;"
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"nop;"
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"csync;"
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);
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else
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__asm__ __volatile__("csync;");
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}
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#else /* __ASSEMBLY__ */
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/* SSYNC & CSYNC implementations for assembly files */
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#define ssync(x) SSYNC(x)
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#define csync(x) CSYNC(x)
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#if ANOMALY_05000312
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#define SSYNC(scratch) cli scratch; nop; nop; SSYNC; sti scratch;
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#define CSYNC(scratch) cli scratch; nop; nop; CSYNC; sti scratch;
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#elif ANOMALY_05000244
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#define SSYNC(scratch) nop; nop; nop; SSYNC;
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#define CSYNC(scratch) nop; nop; nop; CSYNC;
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#else
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#define SSYNC(scratch) SSYNC;
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#define CSYNC(scratch) CSYNC;
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#endif /* ANOMALY_05000312 & ANOMALY_05000244 handling */
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#endif /* __ASSEMBLY__ */
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#endif
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