d01e8897fc
Patch from Lennert Buytenhek
This patch adds a microcode loader for the ixp2000 architecture.
The ixp2000 is an xscale-based CPU with a number of additional small
CPUs ('microengines') on die that can be programmed to do various
things. Depending on the ixp2000 model, there are between 2 and 16
microengines.
This code provides an API that allows configuring the microengines,
loading code into them, and starting and stopping them and reading
out a number of status registers, and is used by the microengine
network driver that was recently announced to netdev.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/*
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* Generic library functions for the microengines found on the Intel
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* IXP2000 series of network processors.
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*
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* Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
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* Dedicated to Marija Kulikova.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*/
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#ifndef __IXP2000_UENGINE_H
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#define __IXP2000_UENGINE_H
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extern u32 ixp2000_uengine_mask;
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struct ixp2000_uengine_code
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{
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u32 cpu_model_bitmask;
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u8 cpu_min_revision;
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u8 cpu_max_revision;
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u32 uengine_parameters;
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struct ixp2000_reg_value {
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int reg;
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u32 value;
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} *initial_reg_values;
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int num_insns;
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u8 *insns;
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};
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u32 ixp2000_uengine_csr_read(int uengine, int offset);
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void ixp2000_uengine_csr_write(int uengine, int offset, u32 value);
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void ixp2000_uengine_reset(u32 uengine_mask);
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void ixp2000_uengine_set_mode(int uengine, u32 mode);
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void ixp2000_uengine_load_microcode(int uengine, u8 *ucode, int insns);
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void ixp2000_uengine_init_context(int uengine, int context, int pc);
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void ixp2000_uengine_start_contexts(int uengine, u8 ctx_mask);
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void ixp2000_uengine_stop_contexts(int uengine, u8 ctx_mask);
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int ixp2000_uengine_load(int uengine, struct ixp2000_uengine_code *c);
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#define IXP2000_UENGINE_8_CONTEXTS 0x00000000
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#define IXP2000_UENGINE_4_CONTEXTS 0x80000000
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#define IXP2000_UENGINE_PRN_UPDATE_EVERY 0x40000000
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#define IXP2000_UENGINE_PRN_UPDATE_ON_ACCESS 0x00000000
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#define IXP2000_UENGINE_NN_FROM_SELF 0x00100000
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#define IXP2000_UENGINE_NN_FROM_PREVIOUS 0x00000000
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#define IXP2000_UENGINE_ASSERT_EMPTY_AT_3 0x000c0000
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#define IXP2000_UENGINE_ASSERT_EMPTY_AT_2 0x00080000
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#define IXP2000_UENGINE_ASSERT_EMPTY_AT_1 0x00040000
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#define IXP2000_UENGINE_ASSERT_EMPTY_AT_0 0x00000000
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#define IXP2000_UENGINE_LM_ADDR1_GLOBAL 0x00020000
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#define IXP2000_UENGINE_LM_ADDR1_PER_CONTEXT 0x00000000
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#define IXP2000_UENGINE_LM_ADDR0_GLOBAL 0x00010000
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#define IXP2000_UENGINE_LM_ADDR0_PER_CONTEXT 0x00000000
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#endif
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