[PATCH v2 2/2] drivers: net: xgene: Adding support for TSO
Iyappan Subramanian
isubramanian at apm.com
Wed Aug 26 11:48:06 PDT 2015
Signed-off-by: Iyappan Subramanian <isubramanian at apm.com>
---
drivers/net/ethernet/apm/xgene/xgene_enet_hw.h | 16 +-
drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 249 ++++++++++++++++++++--
drivers/net/ethernet/apm/xgene/xgene_enet_main.h | 11 +
drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 8 +-
drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h | 2 +
5 files changed, 262 insertions(+), 24 deletions(-)
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
index 541bed0..ff05bbc 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
@@ -193,12 +193,16 @@ enum xgene_enet_rm {
#define USERINFO_LEN 32
#define FPQNUM_POS 32
#define FPQNUM_LEN 12
+#define NV_POS 50
+#define NV_LEN 1
+#define LL_POS 51
+#define LL_LEN 1
#define LERR_POS 60
#define LERR_LEN 3
#define STASH_POS 52
#define STASH_LEN 2
#define BUFDATALEN_POS 48
-#define BUFDATALEN_LEN 12
+#define BUFDATALEN_LEN 15
#define DATAADDR_POS 0
#define DATAADDR_LEN 42
#define COHERENT_POS 63
@@ -215,9 +219,19 @@ enum xgene_enet_rm {
#define IPHDR_LEN 6
#define EC_POS 22 /* Enable checksum */
#define EC_LEN 1
+#define ET_POS 23 /* Enable TSO */
#define IS_POS 24 /* IP protocol select */
#define IS_LEN 1
#define TYPE_ETH_WORK_MESSAGE_POS 44
+#define LL_BYTES_MSB_POS 56
+#define LL_BYTES_MSB_LEN 8
+#define LL_BYTES_LSB_POS 48
+#define LL_BYTES_LSB_LEN 12
+#define LL_LEN_POS 48
+#define LL_LEN_LEN 8
+#define DATALEN_MASK GENMASK(11, 0)
+
+#define LAST_BUFFER (0x7800ULL << BUFDATALEN_POS)
struct xgene_enet_raw_desc {
__le64 m0;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 652b4c3..b330cb6 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -147,18 +147,27 @@ static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring,
{
struct sk_buff *skb;
struct device *dev;
+ skb_frag_t *frag;
+ dma_addr_t *frag_dma_addr;
u16 skb_index;
u8 status;
- int ret = 0;
+ int i, ret = 0;
skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
skb = cp_ring->cp_skb[skb_index];
+ frag_dma_addr = &cp_ring->frag_dma_addr[skb_index * MAX_SKB_FRAGS];
dev = ndev_to_dev(cp_ring->ndev);
dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)),
- GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1)),
+ skb_headlen(skb),
DMA_TO_DEVICE);
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ frag = &skb_shinfo(skb)->frags[i];
+ dma_unmap_page(dev, frag_dma_addr[i], skb_frag_size(frag),
+ DMA_TO_DEVICE);
+ }
+
/* Checking for error */
status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
if (unlikely(status > 2)) {
@@ -179,12 +188,16 @@ static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring,
static u64 xgene_enet_work_msg(struct sk_buff *skb)
{
+ struct net_device *ndev = skb->dev;
+ struct xgene_enet_pdata *pdata = netdev_priv(ndev);
struct iphdr *iph;
- u8 l3hlen, l4hlen = 0;
- u8 csum_enable = 0;
- u8 proto = 0;
- u8 ethhdr;
- u64 hopinfo;
+ u8 l3hlen = 0, l4hlen = 0;
+ u8 ethhdr, proto = 0, csum_enable = 0;
+ u64 hopinfo = 0;
+ u32 hdr_len, mss = 0;
+ u32 i, len, nr_frags;
+
+ ethhdr = xgene_enet_hdr_len(skb->data);
if (unlikely(skb->protocol != htons(ETH_P_IP)) &&
unlikely(skb->protocol != htons(ETH_P_8021Q)))
@@ -201,14 +214,40 @@ static u64 xgene_enet_work_msg(struct sk_buff *skb)
l4hlen = tcp_hdrlen(skb) >> 2;
csum_enable = 1;
proto = TSO_IPPROTO_TCP;
+ if (ndev->features & NETIF_F_TSO) {
+ hdr_len = ethhdr + ip_hdrlen(skb) + tcp_hdrlen(skb);
+ mss = skb_shinfo(skb)->gso_size;
+
+ if (skb_is_nonlinear(skb)) {
+ len = skb_headlen(skb);
+ nr_frags = skb_shinfo(skb)->nr_frags;
+
+ for (i = 0; i < 2 && i < nr_frags; i++)
+ len += skb_shinfo(skb)->frags[i].size;
+
+ /* HW requires header must reside in 3 buffer */
+ if (unlikely(hdr_len > len)) {
+ if (skb_linearize(skb))
+ return 0;
+ }
+ }
+
+ if (!mss || ((skb->len - hdr_len) <= mss))
+ goto out;
+
+ if (mss != pdata->mss) {
+ pdata->mss = mss;
+ pdata->mac_ops->set_mss(pdata);
+ }
+ hopinfo |= SET_BIT(ET);
+ }
} else if (iph->protocol == IPPROTO_UDP) {
l4hlen = UDP_HDR_SIZE;
csum_enable = 1;
}
out:
l3hlen = ip_hdrlen(skb) >> 2;
- ethhdr = xgene_enet_hdr_len(skb->data);
- hopinfo = SET_VAL(TCPHDR, l4hlen) |
+ hopinfo |= SET_VAL(TCPHDR, l4hlen) |
SET_VAL(IPHDR, l3hlen) |
SET_VAL(ETHHDR, ethhdr) |
SET_VAL(EC, csum_enable) |
@@ -224,20 +263,54 @@ static u16 xgene_enet_encode_len(u16 len)
return (len == BUFLEN_16K) ? 0 : len;
}
+static void xgene_set_addr_len(__le64 *desc, u32 idx, dma_addr_t addr, u32 len)
+{
+ desc[idx ^ 1] = cpu_to_le64(SET_VAL(DATAADDR, addr) |
+ SET_VAL(BUFDATALEN, len));
+}
+
+static __le64 *xgene_enet_get_exp_bufs(struct xgene_enet_desc_ring *ring)
+{
+ __le64 *exp_bufs;
+
+ exp_bufs = &ring->exp_bufs[ring->exp_buf_tail * MAX_EXP_BUFFS];
+ memset(exp_bufs, 0, sizeof(__le64) * MAX_EXP_BUFFS);
+ ring->exp_buf_tail = (ring->exp_buf_tail + 1) & ((ring->slots / 2) - 1);
+
+ return exp_bufs;
+}
+
+static dma_addr_t *xgene_get_frag_dma_array(struct xgene_enet_desc_ring *ring)
+{
+ return &ring->cp_ring->frag_dma_addr[ring->tail * MAX_SKB_FRAGS];
+}
+
static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring,
struct sk_buff *skb)
{
struct device *dev = ndev_to_dev(tx_ring->ndev);
struct xgene_enet_raw_desc *raw_desc;
- dma_addr_t dma_addr;
+ __le64 *exp_desc = NULL, *exp_bufs = NULL;
+ dma_addr_t dma_addr, pbuf_addr, *frag_dma_addr;
+ skb_frag_t *frag;
u16 tail = tx_ring->tail;
u64 hopinfo;
u32 len, hw_len;
- u8 count = 1;
+ u8 ll = 0, nv = 0, idx = 0;
+ bool split = false;
+ u32 size, offset, ell_bytes = 0;
+ u32 i, fidx, nr_frags, count = 1;
raw_desc = &tx_ring->raw_desc[tail];
+ tail = (tail + 1) & (tx_ring->slots - 1);
memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc));
+ hopinfo = xgene_enet_work_msg(skb);
+ if (!hopinfo)
+ return -EINVAL;
+ raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) |
+ hopinfo);
+
len = skb_headlen(skb);
hw_len = xgene_enet_encode_len(len);
@@ -252,13 +325,100 @@ static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring,
SET_VAL(BUFDATALEN, hw_len) |
SET_BIT(COHERENT));
- raw_desc->m0 = cpu_to_le64(SET_VAL(USERINFO, tail));
- hopinfo = xgene_enet_work_msg(skb);
- raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) |
- hopinfo);
- tx_ring->cp_ring->cp_skb[tail] = skb;
+ if (!skb_is_nonlinear(skb))
+ goto out;
+ /* scatter gather */
+ nv = 1;
+ exp_desc = (void *)&tx_ring->raw_desc[tail];
tail = (tail + 1) & (tx_ring->slots - 1);
+ memset(exp_desc, 0, sizeof(struct xgene_enet_raw_desc));
+
+ nr_frags = skb_shinfo(skb)->nr_frags;
+ for (i = nr_frags; i < 4 ; i++)
+ exp_desc[i ^ 1] = cpu_to_le64(LAST_BUFFER);
+
+ frag_dma_addr = xgene_get_frag_dma_array(tx_ring);
+
+ for (i = 0, fidx = 0; split || (fidx < nr_frags); i++) {
+ if (!split) {
+ frag = &skb_shinfo(skb)->frags[fidx];
+ size = skb_frag_size(frag);
+ offset = 0;
+
+ pbuf_addr = skb_frag_dma_map(dev, frag, 0, size,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, pbuf_addr))
+ return -EINVAL;
+
+ frag_dma_addr[fidx] = pbuf_addr;
+ fidx++;
+
+ if (size > BUFLEN_16K)
+ split = true;
+ }
+
+ if (size > BUFLEN_16K) {
+ len = BUFLEN_16K;
+ size -= BUFLEN_16K;
+ } else {
+ len = size;
+ split = false;
+ }
+
+ dma_addr = pbuf_addr + offset;
+ hw_len = xgene_enet_encode_len(len);
+
+ switch (i) {
+ case 0:
+ case 1:
+ case 2:
+ xgene_set_addr_len(exp_desc, i, dma_addr, hw_len);
+ break;
+ case 3:
+ if (split || (fidx != nr_frags)) {
+ exp_bufs = xgene_enet_get_exp_bufs(tx_ring);
+ xgene_set_addr_len(exp_bufs, idx, dma_addr,
+ hw_len);
+ idx++;
+ ell_bytes += len;
+ } else {
+ xgene_set_addr_len(exp_desc, i, dma_addr,
+ hw_len);
+ }
+ break;
+ default:
+ xgene_set_addr_len(exp_bufs, idx, dma_addr, hw_len);
+ idx++;
+ ell_bytes += len;
+ break;
+ }
+
+ if (split)
+ offset += BUFLEN_16K;
+ }
+ count++;
+
+ if (idx) {
+ ll = 1;
+ dma_addr = dma_map_single(dev, exp_bufs,
+ sizeof(u64) * MAX_EXP_BUFFS,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, dma_addr)) {
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+ i = ell_bytes >> LL_BYTES_LSB_LEN;
+ exp_desc[2] = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
+ SET_VAL(LL_BYTES_MSB, i) |
+ SET_VAL(LL_LEN, idx));
+ raw_desc->m2 = cpu_to_le64(SET_VAL(LL_BYTES_LSB, ell_bytes));
+ }
+
+out:
+ raw_desc->m0 = cpu_to_le64(SET_VAL(LL, ll) | SET_VAL(NV, nv) |
+ SET_VAL(USERINFO, tx_ring->tail));
+ tx_ring->cp_ring->cp_skb[tx_ring->tail] = skb;
tx_ring->tail = tail;
return count;
@@ -281,6 +441,9 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
return NETDEV_TX_BUSY;
}
+ if (skb_padto(skb, XGENE_MIN_ENET_FRAME_SIZE))
+ return NETDEV_TX_OK;
+
count = xgene_enet_setup_tx_desc(tx_ring, skb);
if (count <= 0) {
dev_kfree_skb_any(skb);
@@ -341,7 +504,7 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring,
/* strip off CRC as HW isn't doing this */
datalen = GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1));
- datalen -= 4;
+ datalen = (datalen & DATALEN_MASK) - 4;
prefetch(skb->data - NET_IP_ALIGN);
skb_put(skb, datalen);
@@ -373,26 +536,41 @@ static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
int budget)
{
struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
- struct xgene_enet_raw_desc *raw_desc;
+ struct xgene_enet_raw_desc *raw_desc, *exp_desc;
u16 head = ring->head;
u16 slots = ring->slots - 1;
- int ret, count = 0;
+ int ret, count = 0, processed = 0;
do {
raw_desc = &ring->raw_desc[head];
+ exp_desc = NULL;
if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc)))
break;
/* read fpqnum field after dataaddr field */
dma_rmb();
+ if (GET_BIT(NV, le64_to_cpu(raw_desc->m0))) {
+ head = (head + 1) & slots;
+ exp_desc = &ring->raw_desc[head];
+
+ if (unlikely(xgene_enet_is_desc_slot_empty(exp_desc))) {
+ head = (head - 1) & slots;
+ break;
+ }
+ dma_rmb();
+ count++;
+ }
if (is_rx_desc(raw_desc))
ret = xgene_enet_rx_frame(ring, raw_desc);
else
ret = xgene_enet_tx_completion(ring, raw_desc);
xgene_enet_mark_desc_slot_empty(raw_desc);
+ if (exp_desc)
+ xgene_enet_mark_desc_slot_empty(exp_desc);
head = (head + 1) & slots;
count++;
+ processed++;
if (ret)
break;
@@ -408,7 +586,7 @@ static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
}
}
- return count;
+ return processed;
}
static int xgene_enet_napi(struct napi_struct *napi, const int budget)
@@ -753,12 +931,13 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring;
struct xgene_enet_desc_ring *buf_pool = NULL;
enum xgene_ring_owner owner;
+ dma_addr_t dma_exp_bufs;
u8 cpu_bufnum = pdata->cpu_bufnum;
u8 eth_bufnum = pdata->eth_bufnum;
u8 bp_bufnum = pdata->bp_bufnum;
u16 ring_num = pdata->ring_num;
u16 ring_id;
- int ret;
+ int ret, size;
/* allocate rx descriptor ring */
owner = xgene_derive_ring_owner(pdata);
@@ -809,6 +988,15 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
ret = -ENOMEM;
goto err;
}
+
+ size = (tx_ring->slots / 2) * sizeof(__le64) * MAX_EXP_BUFFS;
+ tx_ring->exp_bufs = dma_zalloc_coherent(dev, size, &dma_exp_bufs,
+ GFP_KERNEL);
+ if (!tx_ring->exp_bufs) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
pdata->tx_ring = tx_ring;
if (!pdata->cq_cnt) {
@@ -833,6 +1021,16 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
ret = -ENOMEM;
goto err;
}
+
+ size = sizeof(dma_addr_t) * MAX_SKB_FRAGS;
+ cp_ring->frag_dma_addr = devm_kcalloc(dev, tx_ring->slots,
+ size, GFP_KERNEL);
+ if (!cp_ring->frag_dma_addr) {
+ devm_kfree(dev, cp_ring->cp_skb);
+ ret = -ENOMEM;
+ goto err;
+ }
+
pdata->tx_ring->cp_ring = cp_ring;
pdata->tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring);
@@ -1188,7 +1386,8 @@ static int xgene_enet_probe(struct platform_device *pdev)
xgene_enet_set_ethtool_ops(ndev);
ndev->features |= NETIF_F_IP_CSUM |
NETIF_F_GSO |
- NETIF_F_GRO;
+ NETIF_F_GRO |
+ NETIF_F_SG;
of_id = of_match_device(xgene_enet_of_match, &pdev->dev);
if (of_id) {
@@ -1214,6 +1413,12 @@ static int xgene_enet_probe(struct platform_device *pdev)
xgene_enet_setup_ops(pdata);
+ if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
+ ndev->features |= NETIF_F_TSO;
+ pdata->mss = XGENE_ENET_MSS;
+ }
+ ndev->hw_features = ndev->features;
+
ret = register_netdev(ndev);
if (ret) {
netdev_err(ndev, "Failed to register netdev\n");
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
index 2ac547e..50f92c3 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -43,6 +43,9 @@
#define BUFLEN_16K (16 * 1024)
#define NUM_PKT_BUF 64
#define NUM_BUFPOOL 32
+#define MAX_EXP_BUFFS 256
+#define XGENE_ENET_MSS 1448
+#define XGENE_MIN_ENET_FRAME_SIZE 60
#define START_CPU_BUFNUM_0 0
#define START_ETH_BUFNUM_0 2
@@ -80,6 +83,7 @@ struct xgene_enet_desc_ring {
u16 num;
u16 head;
u16 tail;
+ u16 exp_buf_tail;
u16 slots;
u16 irq;
char irq_name[IRQ_ID_SIZE];
@@ -94,6 +98,7 @@ struct xgene_enet_desc_ring {
u8 nbufpool;
struct sk_buff *(*rx_skb);
struct sk_buff *(*cp_skb);
+ dma_addr_t *frag_dma_addr;
enum xgene_enet_ring_cfgsize cfgsize;
struct xgene_enet_desc_ring *cp_ring;
struct xgene_enet_desc_ring *buf_pool;
@@ -103,6 +108,7 @@ struct xgene_enet_desc_ring {
struct xgene_enet_raw_desc *raw_desc;
struct xgene_enet_raw_desc16 *raw_desc16;
};
+ __le64 *exp_bufs;
};
struct xgene_mac_ops {
@@ -113,6 +119,7 @@ struct xgene_mac_ops {
void (*tx_disable)(struct xgene_enet_pdata *pdata);
void (*rx_disable)(struct xgene_enet_pdata *pdata);
void (*set_mac_addr)(struct xgene_enet_pdata *pdata);
+ void (*set_mss)(struct xgene_enet_pdata *pdata);
void (*link_state)(struct work_struct *work);
};
@@ -171,6 +178,7 @@ struct xgene_enet_pdata {
u8 eth_bufnum;
u8 bp_bufnum;
u16 ring_num;
+ u32 mss;
};
struct xgene_indirect_ctl {
@@ -205,6 +213,9 @@ static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
#define GET_VAL(field, src) \
xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
+#define GET_BIT(field, src) \
+ xgene_enet_get_field_value(field ## _POS, 1, src)
+
static inline struct device *ndev_to_dev(struct net_device *ndev)
{
return ndev->dev.parent;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
index 05edb84..7a28a48 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
@@ -184,6 +184,11 @@ static void xgene_xgmac_set_mac_addr(struct xgene_enet_pdata *pdata)
xgene_enet_wr_mac(pdata, HSTMACADR_MSW_ADDR, addr1);
}
+static void xgene_xgmac_set_mss(struct xgene_enet_pdata *pdata)
+{
+ xgene_enet_wr_csr(pdata, XG_TSIF_MSS_REG0_ADDR, pdata->mss);
+}
+
static u32 xgene_enet_link_status(struct xgene_enet_pdata *pdata)
{
u32 data;
@@ -204,8 +209,8 @@ static void xgene_xgmac_init(struct xgene_enet_pdata *pdata)
data &= ~HSTLENCHK;
xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
- xgene_enet_wr_mac(pdata, HSTMAXFRAME_LENGTH_ADDR, 0x06000600);
xgene_xgmac_set_mac_addr(pdata);
+ xgene_xgmac_set_mss(pdata);
xgene_enet_rd_csr(pdata, XG_RSIF_CONFIG_REG_ADDR, &data);
data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
@@ -329,6 +334,7 @@ struct xgene_mac_ops xgene_xgmac_ops = {
.rx_disable = xgene_xgmac_rx_disable,
.tx_disable = xgene_xgmac_tx_disable,
.set_mac_addr = xgene_xgmac_set_mac_addr,
+ .set_mss = xgene_xgmac_set_mss,
.link_state = xgene_enet_link_state
};
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
index bf0a994..f8f908d 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
@@ -62,7 +62,9 @@
#define XCLE_BYPASS_REG0_ADDR 0x0160
#define XCLE_BYPASS_REG1_ADDR 0x0164
#define XG_CFG_BYPASS_ADDR 0x0204
+#define XG_CFG_LINK_AGGR_RESUME_0_ADDR 0x0214
#define XG_LINK_STATUS_ADDR 0x0228
+#define XG_TSIF_MSS_REG0_ADDR 0x02a4
#define XG_ENET_SPARE_CFG_REG_ADDR 0x040c
#define XG_ENET_SPARE_CFG_REG_1_ADDR 0x0410
#define XGENET_RX_DV_GATE_REG_0_ADDR 0x0804
--
1.9.1
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