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-rw-r--r--drivers/net/ethernet/xscale/ixp2000/ixp2400_rx.uc408
1 files changed, 0 insertions, 408 deletions
diff --git a/drivers/net/ethernet/xscale/ixp2000/ixp2400_rx.uc b/drivers/net/ethernet/xscale/ixp2000/ixp2400_rx.uc
deleted file mode 100644
index 42a73e357afa..000000000000
--- a/drivers/net/ethernet/xscale/ixp2000/ixp2400_rx.uc
+++ /dev/null
@@ -1,408 +0,0 @@
-/*
- * RX ucode for the Intel IXP2400 in POS-PHY mode.
- * Copyright (C) 2004, 2005 Lennert Buytenhek
- * Dedicated to Marija Kulikova.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Assumptions made in this code:
- * - The IXP2400 MSF is configured for POS-PHY mode, in a mode where
- * only one full element list is used. This includes, for example,
- * 1x32 SPHY and 1x32 MPHY32, but not 4x8 SPHY or 1x32 MPHY4. (This
- * is not an exhaustive list.)
- * - The RBUF uses 64-byte mpackets.
- * - RX descriptors reside in SRAM, and have the following format:
- * struct rx_desc
- * {
- * // to uengine
- * u32 buf_phys_addr;
- * u32 buf_length;
- *
- * // from uengine
- * u32 channel;
- * u32 pkt_length;
- * };
- * - Packet data resides in DRAM.
- * - Packet buffer addresses are 8-byte aligned.
- * - Scratch ring 0 is rx_pending.
- * - Scratch ring 1 is rx_done, and has status condition 'full'.
- * - The host triggers rx_done flush and rx_pending refill on seeing INTA.
- * - This code is run on all eight threads of the microengine it runs on.
- *
- * Local memory is used for per-channel RX state.
- */
-
-#define RX_THREAD_FREELIST_0 0x0030
-#define RBUF_ELEMENT_DONE 0x0044
-
-#define CHANNEL_FLAGS *l$index0[0]
-#define CHANNEL_FLAG_RECEIVING 1
-#define PACKET_LENGTH *l$index0[1]
-#define PACKET_CHECKSUM *l$index0[2]
-#define BUFFER_HANDLE *l$index0[3]
-#define BUFFER_START *l$index0[4]
-#define BUFFER_LENGTH *l$index0[5]
-
-#define CHANNEL_STATE_SIZE 24 // in bytes
-#define CHANNEL_STATE_SHIFT 5 // ceil(log2(state size))
-
-
- .sig volatile sig1
- .sig volatile sig2
- .sig volatile sig3
-
- .sig mpacket_arrived
- .reg add_to_rx_freelist
- .reg read $rsw0, $rsw1
- .xfer_order $rsw0 $rsw1
-
- .reg zero
-
- /*
- * Initialise add_to_rx_freelist.
- */
- .begin
- .reg temp
- .reg temp2
-
- immed[add_to_rx_freelist, RX_THREAD_FREELIST_0]
- immed_w1[add_to_rx_freelist, (&$rsw0 | (&mpacket_arrived << 12))]
-
- local_csr_rd[ACTIVE_CTX_STS]
- immed[temp, 0]
- alu[temp2, temp, and, 0x1f]
- alu_shf[add_to_rx_freelist, add_to_rx_freelist, or, temp2, <<20]
- alu[temp2, temp, and, 0x80]
- alu_shf[add_to_rx_freelist, add_to_rx_freelist, or, temp2, <<18]
- .end
-
- immed[zero, 0]
-
- /*
- * Skip context 0 initialisation?
- */
- .begin
- br!=ctx[0, mpacket_receive_loop#]
- .end
-
- /*
- * Initialise local memory.
- */
- .begin
- .reg addr
- .reg temp
-
- immed[temp, 0]
- init_local_mem_loop#:
- alu_shf[addr, --, b, temp, <<CHANNEL_STATE_SHIFT]
- local_csr_wr[ACTIVE_LM_ADDR_0, addr]
- nop
- nop
- nop
-
- immed[CHANNEL_FLAGS, 0]
-
- alu[temp, temp, +, 1]
- alu[--, temp, and, 0x20]
- beq[init_local_mem_loop#]
- .end
-
- /*
- * Initialise signal pipeline.
- */
- .begin
- local_csr_wr[SAME_ME_SIGNAL, (&sig1 << 3)]
- .set_sig sig1
-
- local_csr_wr[SAME_ME_SIGNAL, (&sig2 << 3)]
- .set_sig sig2
-
- local_csr_wr[SAME_ME_SIGNAL, (&sig3 << 3)]
- .set_sig sig3
- .end
-
-mpacket_receive_loop#:
- /*
- * Synchronise and wait for mpacket.
- */
- .begin
- ctx_arb[sig1]
- local_csr_wr[SAME_ME_SIGNAL, (0x80 | (&sig1 << 3))]
-
- msf[fast_wr, --, add_to_rx_freelist, 0]
- .set_sig mpacket_arrived
- ctx_arb[mpacket_arrived]
- .set $rsw0 $rsw1
- .end
-
- /*
- * We halt if we see {inbparerr,parerr,null,soperror}.
- */
- .begin
- alu_shf[--, 0x1b, and, $rsw0, >>8]
- bne[abort_rswerr#]
- .end
-
- /*
- * Point local memory pointer to this channel's state area.
- */
- .begin
- .reg chanaddr
-
- alu[chanaddr, $rsw0, and, 0x1f]
- alu_shf[chanaddr, --, b, chanaddr, <<CHANNEL_STATE_SHIFT]
- local_csr_wr[ACTIVE_LM_ADDR_0, chanaddr]
- nop
- nop
- nop
- .end
-
- /*
- * Check whether we received a SOP mpacket while we were already
- * working on a packet, or a non-SOP mpacket while there was no
- * packet pending. (SOP == RECEIVING -> abort) If everything's
- * okay, update the RECEIVING flag to reflect our new state.
- */
- .begin
- .reg temp
- .reg eop
-
- #if CHANNEL_FLAG_RECEIVING != 1
- #error CHANNEL_FLAG_RECEIVING is not 1
- #endif
-
- alu_shf[temp, 1, and, $rsw0, >>15]
- alu[temp, temp, xor, CHANNEL_FLAGS]
- alu[--, temp, and, CHANNEL_FLAG_RECEIVING]
- beq[abort_proterr#]
-
- alu_shf[eop, 1, and, $rsw0, >>14]
- alu[CHANNEL_FLAGS, temp, xor, eop]
- .end
-
- /*
- * Copy the mpacket into the right spot, and in case of EOP,
- * write back the descriptor and pass the packet on.
- */
- .begin
- .reg buffer_offset
- .reg _packet_length
- .reg _packet_checksum
- .reg _buffer_handle
- .reg _buffer_start
- .reg _buffer_length
-
- /*
- * Determine buffer_offset, _packet_length and
- * _packet_checksum.
- */
- .begin
- .reg temp
-
- alu[--, 1, and, $rsw0, >>15]
- beq[not_sop#]
-
- immed[PACKET_LENGTH, 0]
- immed[PACKET_CHECKSUM, 0]
-
- not_sop#:
- alu[buffer_offset, --, b, PACKET_LENGTH]
- alu_shf[temp, 0xff, and, $rsw0, >>16]
- alu[_packet_length, buffer_offset, +, temp]
- alu[PACKET_LENGTH, --, b, _packet_length]
-
- immed[temp, 0xffff]
- alu[temp, $rsw1, and, temp]
- alu[_packet_checksum, PACKET_CHECKSUM, +, temp]
- alu[PACKET_CHECKSUM, --, b, _packet_checksum]
- .end
-
- /*
- * Allocate buffer in case of SOP.
- */
- .begin
- .reg temp
-
- alu[temp, 1, and, $rsw0, >>15]
- beq[skip_buffer_alloc#]
-
- .begin
- .sig zzz
- .reg read $stemp $stemp2
- .xfer_order $stemp $stemp2
-
- rx_nobufs#:
- scratch[get, $stemp, zero, 0, 1], ctx_swap[zzz]
- alu[_buffer_handle, --, b, $stemp]
- beq[rx_nobufs#]
-
- sram[read, $stemp, _buffer_handle, 0, 2],
- ctx_swap[zzz]
- alu[_buffer_start, --, b, $stemp]
- alu[_buffer_length, --, b, $stemp2]
- .end
-
- skip_buffer_alloc#:
- .end
-
- /*
- * Resynchronise.
- */
- .begin
- ctx_arb[sig2]
- local_csr_wr[SAME_ME_SIGNAL, (0x80 | (&sig2 << 3))]
- .end
-
- /*
- * Synchronise buffer state.
- */
- .begin
- .reg temp
-
- alu[temp, 1, and, $rsw0, >>15]
- beq[copy_from_local_mem#]
-
- alu[BUFFER_HANDLE, --, b, _buffer_handle]
- alu[BUFFER_START, --, b, _buffer_start]
- alu[BUFFER_LENGTH, --, b, _buffer_length]
- br[sync_state_done#]
-
- copy_from_local_mem#:
- alu[_buffer_handle, --, b, BUFFER_HANDLE]
- alu[_buffer_start, --, b, BUFFER_START]
- alu[_buffer_length, --, b, BUFFER_LENGTH]
-
- sync_state_done#:
- .end
-
-#if 0
- /*
- * Debug buffer state management.
- */
- .begin
- .reg temp
-
- alu[temp, 1, and, $rsw0, >>14]
- beq[no_poison#]
- immed[BUFFER_HANDLE, 0xdead]
- immed[BUFFER_START, 0xdead]
- immed[BUFFER_LENGTH, 0xdead]
- no_poison#:
-
- immed[temp, 0xdead]
- alu[--, _buffer_handle, -, temp]
- beq[state_corrupted#]
- alu[--, _buffer_start, -, temp]
- beq[state_corrupted#]
- alu[--, _buffer_length, -, temp]
- beq[state_corrupted#]
- .end
-#endif
-
- /*
- * Check buffer length.
- */
- .begin
- alu[--, _buffer_length, -, _packet_length]
- blo[buffer_overflow#]
- .end
-
- /*
- * Copy the mpacket and give back the RBUF element.
- */
- .begin
- .reg element
- .reg xfer_size
- .reg temp
- .sig copy_sig
-
- alu_shf[element, 0x7f, and, $rsw0, >>24]
- alu_shf[xfer_size, 0xff, and, $rsw0, >>16]
-
- alu[xfer_size, xfer_size, -, 1]
- alu_shf[xfer_size, 0x10, or, xfer_size, >>3]
- alu_shf[temp, 0x10, or, xfer_size, <<21]
- alu_shf[temp, temp, or, element, <<11]
- alu_shf[--, temp, or, 1, <<18]
-
- dram[rbuf_rd, --, _buffer_start, buffer_offset, max_8],
- indirect_ref, sig_done[copy_sig]
- ctx_arb[copy_sig]
-
- alu[temp, RBUF_ELEMENT_DONE, or, element, <<16]
- msf[fast_wr, --, temp, 0]
- .end
-
- /*
- * If EOP, write back the packet descriptor.
- */
- .begin
- .reg write $stemp $stemp2
- .xfer_order $stemp $stemp2
- .sig zzz
-
- alu_shf[--, 1, and, $rsw0, >>14]
- beq[no_writeback#]
-
- alu[$stemp, $rsw0, and, 0x1f]
- alu[$stemp2, --, b, _packet_length]
- sram[write, $stemp, _buffer_handle, 8, 2], ctx_swap[zzz]
-
- no_writeback#:
- .end
-
- /*
- * Resynchronise.
- */
- .begin
- ctx_arb[sig3]
- local_csr_wr[SAME_ME_SIGNAL, (0x80 | (&sig3 << 3))]
- .end
-
- /*
- * If EOP, put the buffer back onto the scratch ring.
- */
- .begin
- .reg write $stemp
- .sig zzz
-
- br_inp_state[SCR_Ring1_Status, rx_done_ring_overflow#]
-
- alu_shf[--, 1, and, $rsw0, >>14]
- beq[mpacket_receive_loop#]
-
- alu[--, 1, and, $rsw0, >>10]
- bne[rxerr#]
-
- alu[$stemp, --, b, _buffer_handle]
- scratch[put, $stemp, zero, 4, 1], ctx_swap[zzz]
- cap[fast_wr, 0, XSCALE_INT_A]
- br[mpacket_receive_loop#]
-
- rxerr#:
- alu[$stemp, --, b, _buffer_handle]
- scratch[put, $stemp, zero, 0, 1], ctx_swap[zzz]
- br[mpacket_receive_loop#]
- .end
- .end
-
-
-abort_rswerr#:
- halt
-
-abort_proterr#:
- halt
-
-state_corrupted#:
- halt
-
-buffer_overflow#:
- halt
-
-rx_done_ring_overflow#:
- halt
-
-