l3_handle_target(9)

💅 l3_handle_target 💅

okay so this is a page from the Kernel API Manual bestie, and it's all about l3_handle_target — literally the second-half glow-up of L3 error interrupt handling 🫶

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✨ NAME ✨

l3_handle_target — handles the Target-specific parse and reporting, no cap 🎯

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🌸 SYNOPSIS 🌸

int l3_handle_target (struct omap_l3 *l3 , void __iomem *base , struct
l3_flagmux_data *flag_mux , int err_src );

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🎀 ARGUMENTS 🎀

• l3 — a pointer to the l3 struct, she's the main character of this whole situation 💁‍♀️
• base — the base address of clkdm
• flag_mux — the flagmux that corresponds to the event 👀
• err_src — the error source index of the slave (aka the target)

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🦋 DESCRIPTION 🦋

So this function does the second part of the error interrupt handling. Like, part two, the sequel, and honestly? It ate. 🔥

Here's the order it moves in:

3. Parse in the slave information
4. Print the logged information.
5. Add dump stack to provide kernel trace.
6. Clear the source if it's known.

(it starts at 3 because the first two steps happened elsewhere, iykyk 💅)

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💖 the two types of errors it handles 💖

1. Custom errors in L3 — Target like DMM/FW/EMIF generates a SRESP=ERR error
2. Standard L3 error, which is giving:

• Unsupported CMD. L3 tries to access target while it is idle 😴
• OCP disconnect.
• Address hole error: If DSS/ISS/FDIF/USBHOSTFS access a target where they do not have connectivity, the error is logged in their default target which is DMM2.

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🌈 on High Secure devices, firewall errors are possible and those can be trapped as well. But the trapping is implemented as part secure software and hence need not be implemented here. periodt ✋

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/bus/omap_l3_noc.c l3_interrupt_handler(9), l3_resume_noirq(9)

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that's the whole vibe bestie, go read the source if you want more 🧚💜

mwah 💋 — this little icon lives in ./drivers/bus, and the page is stamped October 2026. see u in the next manpage 🎀✨